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NFSv4: The NFSv4.0 client must send RENEW calls if it holds a delegation
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
5a0e3ad6 42#include <linux/slab.h>
1da177e4 43#include <linux/sunrpc/clnt.h>
8f70e95f 44#include <linux/sunrpc/gss_api.h>
1da177e4
LT		 45#include <linux/nfs.h>
46#include <linux/nfs4.h>
47#include <linux/nfs_fs.h>
48#include <linux/nfs_page.h>
9b7160c5 49#include <linux/nfs_mount.h>
1da177e4 50#include <linux/namei.h>
02a913a7 51#include <linux/mount.h>
99fe60d0 52#include <linux/module.h>
5a0ffe54 53#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
1da177e4 56
4ce79717 57#include "nfs4_fs.h"
1da177e4 58#include "delegation.h"
101070ca 59#include "internal.h"
006ea73e 60#include "iostat.h"
fc931582 61#include "callback.h"
b1f69b75 62#include "pnfs.h"
1da177e4
LT		 63
64#define NFSDBG_FACILITY NFSDBG_PROC
65
2066fe89 66#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 67#define NFS4_POLL_RETRY_MAX (15*HZ)
68
a78cb57a
TM		 69#define NFS4_MAX_LOOP_ON_RECOVER (10)
70
cdd4e68b 71struct nfs4_opendata;
864472e9 72static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 73static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 74static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 75static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
7c513058
BS		 76static int _nfs4_proc_lookup(struct rpc_clnt *client, struct inode *dir,
77 const struct qstr *name, struct nfs_fh *fhandle,
78 struct nfs_fattr *fattr);
9936781d 79static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 80static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
81 struct nfs_fattr *fattr, struct iattr *sattr,
82 struct nfs4_state *state);
f062eb6c
BS		 83#ifdef CONFIG_NFS_V4_1
84static int nfs41_test_stateid(struct nfs_server *, struct nfs4_state *);
85static int nfs41_free_stateid(struct nfs_server *, struct nfs4_state *);
86#endif
1da177e4 87/* Prevent leaks of NFSv4 errors into userland */
46f72f57 88static int nfs4_map_errors(int err)
1da177e4 89{
52567b03
TM		 90 if (err >= -1000)
91 return err;
92 switch (err) {
93 case -NFS4ERR_RESOURCE:
94 return -EREMOTEIO;
7ebb9315
BS		 95 case -NFS4ERR_WRONGSEC:
96 return -EPERM;
3ddeb7c5
TM		 97 case -NFS4ERR_BADOWNER:
98 case -NFS4ERR_BADNAME:
99 return -EINVAL;
52567b03 100 default:
1da177e4 101 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 102 __func__, -err);
52567b03 103 break;
1da177e4 104 }
52567b03 105 return -EIO;
1da177e4
LT		 106}
107
108/*
109 * This is our standard bitmap for GETATTR requests.
110 */
111const u32 nfs4_fattr_bitmap[2] = {
112 FATTR4_WORD0_TYPE
113 | FATTR4_WORD0_CHANGE
114 | FATTR4_WORD0_SIZE
115 | FATTR4_WORD0_FSID
116 | FATTR4_WORD0_FILEID,
117 FATTR4_WORD1_MODE
118 | FATTR4_WORD1_NUMLINKS
119 | FATTR4_WORD1_OWNER
120 | FATTR4_WORD1_OWNER_GROUP
121 | FATTR4_WORD1_RAWDEV
122 | FATTR4_WORD1_SPACE_USED
123 | FATTR4_WORD1_TIME_ACCESS
124 | FATTR4_WORD1_TIME_METADATA
125 | FATTR4_WORD1_TIME_MODIFY
126};
127
128const u32 nfs4_statfs_bitmap[2] = {
129 FATTR4_WORD0_FILES_AVAIL
130 | FATTR4_WORD0_FILES_FREE
131 | FATTR4_WORD0_FILES_TOTAL,
132 FATTR4_WORD1_SPACE_AVAIL
133 | FATTR4_WORD1_SPACE_FREE
134 | FATTR4_WORD1_SPACE_TOTAL
135};
136
4ce79717 137const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 138 FATTR4_WORD0_MAXLINK
139 | FATTR4_WORD0_MAXNAME,
140 0
141};
142
dae100c2 143const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 144 | FATTR4_WORD0_MAXREAD
145 | FATTR4_WORD0_MAXWRITE
146 | FATTR4_WORD0_LEASE_TIME,
55b6e774 147 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 148 | FATTR4_WORD1_FS_LAYOUT_TYPES,
149 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 150};
151
830b8e33
MN		 152const u32 nfs4_fs_locations_bitmap[2] = {
153 FATTR4_WORD0_TYPE
154 | FATTR4_WORD0_CHANGE
155 | FATTR4_WORD0_SIZE
156 | FATTR4_WORD0_FSID
157 | FATTR4_WORD0_FILEID
158 | FATTR4_WORD0_FS_LOCATIONS,
159 FATTR4_WORD1_MODE
160 | FATTR4_WORD1_NUMLINKS
161 | FATTR4_WORD1_OWNER
162 | FATTR4_WORD1_OWNER_GROUP
163 | FATTR4_WORD1_RAWDEV
164 | FATTR4_WORD1_SPACE_USED
165 | FATTR4_WORD1_TIME_ACCESS
166 | FATTR4_WORD1_TIME_METADATA
167 | FATTR4_WORD1_TIME_MODIFY
168 | FATTR4_WORD1_MOUNTED_ON_FILEID
169};
170
bc4785cd 171static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 172 struct nfs4_readdir_arg *readdir)
173{
0dbb4c67 174 __be32 *start, *p;
1da177e4
LT		 175
176 BUG_ON(readdir->count < 80);
177 if (cookie > 2) {
b7ef1956 178 readdir->cookie = cookie;
1da177e4
LT		 179 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
180 return;
181 }
182
183 readdir->cookie = 0;
184 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
185 if (cookie == 2)
186 return;
187
188 /*
189 * NFSv4 servers do not return entries for '.' and '..'
190 * Therefore, we fake these entries here. We let '.'
191 * have cookie 0 and '..' have cookie 1. Note that
192 * when talking to the server, we always send cookie 0
193 * instead of 1 or 2.
194 */
0dbb4c67 195 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 196
197 if (cookie == 0) {
198 *p++ = xdr_one; /* next */
199 *p++ = xdr_zero; /* cookie, first word */
200 *p++ = xdr_one; /* cookie, second word */
201 *p++ = xdr_one; /* entry len */
202 memcpy(p, ".\0\0\0", 4); /* entry */
203 p++;
204 *p++ = xdr_one; /* bitmap length */
205 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
206 *p++ = htonl(8); /* attribute buffer length */
4e769b93 207 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 208 }
209
210 *p++ = xdr_one; /* next */
211 *p++ = xdr_zero; /* cookie, first word */
212 *p++ = xdr_two; /* cookie, second word */
213 *p++ = xdr_two; /* entry len */
214 memcpy(p, "..\0\0", 4); /* entry */
215 p++;
216 *p++ = xdr_one; /* bitmap length */
217 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
218 *p++ = htonl(8); /* attribute buffer length */
4e769b93 219 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 220
221 readdir->pgbase = (char *)p - (char *)start;
222 readdir->count -= readdir->pgbase;
223 kunmap_atomic(start, KM_USER0);
224}
225
65de872e
TM		 226static int nfs4_wait_clnt_recover(struct nfs_client *clp)
227{
228 int res;
229
230 might_sleep();
231
e005e804 232 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 233 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 234 return res;
235}
236
237static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
238{
239 int res = 0;
240
241 might_sleep();
242
243 if (*timeout <= 0)
244 *timeout = NFS4_POLL_RETRY_MIN;
245 if (*timeout > NFS4_POLL_RETRY_MAX)
246 *timeout = NFS4_POLL_RETRY_MAX;
247 schedule_timeout_killable(*timeout);
248 if (fatal_signal_pending(current))
249 res = -ERESTARTSYS;
250 *timeout <<= 1;
251 return res;
252}
253
254/* This is the error handling routine for processes that are allowed
255 * to sleep.
256 */
b064eca2 257static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 258{
259 struct nfs_client *clp = server->nfs_client;
9e33bed5 260 struct nfs4_state *state = exception->state;
65de872e
TM		 261 int ret = errorcode;
262
263 exception->retry = 0;
264 switch(errorcode) {
265 case 0:
266 return 0;
9e33bed5
TM		 267 case -NFS4ERR_ADMIN_REVOKED:
268 case -NFS4ERR_BAD_STATEID:
269 case -NFS4ERR_OPENMODE:
270 if (state == NULL)
271 break;
0400a6b0
TM		 272 nfs4_schedule_stateid_recovery(server, state);
273 goto wait_on_recovery;
0ced63d1
TM		 274 case -NFS4ERR_EXPIRED:
275 if (state != NULL)
276 nfs4_schedule_stateid_recovery(server, state);
65de872e 277 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 278 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 279 nfs4_schedule_lease_recovery(clp);
280 goto wait_on_recovery;
03391693 281#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 282 case -NFS4ERR_BADSESSION:
283 case -NFS4ERR_BADSLOT:
284 case -NFS4ERR_BAD_HIGH_SLOT:
285 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
286 case -NFS4ERR_DEADSESSION:
287 case -NFS4ERR_SEQ_FALSE_RETRY:
288 case -NFS4ERR_SEQ_MISORDERED:
289 dprintk("%s ERROR: %d Reset session\n", __func__,
290 errorcode);
0400a6b0 291 nfs4_schedule_session_recovery(clp->cl_session);
4745e315 292 exception->retry = 1;
b9179237 293 break;
03391693 294#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 295 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 296 if (exception->timeout > HZ) {
297 /* We have retried a decent amount, time to
298 * fail
299 */
300 ret = -EBUSY;
301 break;
302 }
65de872e
TM		 303 case -NFS4ERR_GRACE:
304 case -NFS4ERR_DELAY:
2c643488 305 case -EKEYEXPIRED:
65de872e
TM		 306 ret = nfs4_delay(server->client, &exception->timeout);
307 if (ret != 0)
308 break;
a8a4ae3a 309 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 310 case -NFS4ERR_OLD_STATEID:
311 exception->retry = 1;
b064eca2
TM		 312 break;
313 case -NFS4ERR_BADOWNER:
314 /* The following works around a Linux server bug! */
315 case -NFS4ERR_BADNAME:
316 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
317 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
318 exception->retry = 1;
319 printk(KERN_WARNING "NFS: v4 server %s "
320 "does not accept raw "
321 "uid/gids. "
322 "Reenabling the idmapper.\n",
323 server->nfs_client->cl_hostname);
324 }
65de872e
TM		 325 }
326 /* We failed to handle the error */
327 return nfs4_map_errors(ret);
0400a6b0 328wait_on_recovery:
a2c0b9e2
TM		 329 ret = nfs4_wait_clnt_recover(clp);
330 if (ret == 0)
331 exception->retry = 1;
332 return ret;
65de872e
TM		 333}
334
335
452e9352 336static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 337{
1da177e4
LT		 338 spin_lock(&clp->cl_lock);
339 if (time_before(clp->cl_last_renewal,timestamp))
340 clp->cl_last_renewal = timestamp;
341 spin_unlock(&clp->cl_lock);
342}
343
452e9352
TM		 344static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
345{
346 do_renew_lease(server->nfs_client, timestamp);
347}
348
cccef3b9
AA		 349#if defined(CONFIG_NFS_V4_1)
350
e2c4ab3c
AA		 351/*
352 * nfs4_free_slot - free a slot and efficiently update slot table.
353 *
354 * freeing a slot is trivially done by clearing its respective bit
355 * in the bitmap.
356 * If the freed slotid equals highest_used_slotid we want to update it
357 * so that the server would be able to size down the slot table if needed,
358 * otherwise we know that the highest_used_slotid is still in use.
359 * When updating highest_used_slotid there may be "holes" in the bitmap
360 * so we need to scan down from highest_used_slotid to 0 looking for the now
361 * highest slotid in use.
362 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 363 *
364 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 365 */
366static void
dfb4f309 367nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
e2c4ab3c 368{
dfb4f309 369 int free_slotid = free_slot - tbl->slots;
e2c4ab3c
AA		 370 int slotid = free_slotid;
371
dfb4f309 372 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 373 /* clear used bit in bitmap */
374 __clear_bit(slotid, tbl->used_slots);
375
376 /* update highest_used_slotid when it is freed */
377 if (slotid == tbl->highest_used_slotid) {
378 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 379 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 380 tbl->highest_used_slotid = slotid;
381 else
382 tbl->highest_used_slotid = -1;
383 }
e2c4ab3c
AA		 384 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
385 free_slotid, tbl->highest_used_slotid);
386}
387
3bfb0fc5 388/*
42acd021 389 * Signal state manager thread if session fore channel is drained
3bfb0fc5 390 */
42acd021 391static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 392{
689cf5c1
AB		 393 struct rpc_task *task;
394
a2118c33 395 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 396 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
397 if (task)
398 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 399 return;
400 }
401
402 if (ses->fc_slot_table.highest_used_slotid != -1)
403 return;
404
42acd021
AA		 405 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
406 complete(&ses->fc_slot_table.complete);
407}
408
409/*
410 * Signal state manager thread if session back channel is drained
411 */
412void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
413{
414 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
415 ses->bc_slot_table.highest_used_slotid != -1)
416 return;
417 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
418 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 419}
420
d185a334 421static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 422{
423 struct nfs4_slot_table *tbl;
424
d185a334 425 tbl = &res->sr_session->fc_slot_table;
dfb4f309 426 if (!res->sr_slot) {
13615871
AA		 427 /* just wake up the next guy waiting since
428 * we may have not consumed a slot after all */
691daf3b 429 dprintk("%s: No slot\n", __func__);
35dc1d74 430 return;
13615871 431 }
ea028ac9 432
35dc1d74 433 spin_lock(&tbl->slot_tbl_lock);
dfb4f309 434 nfs4_free_slot(tbl, res->sr_slot);
42acd021 435 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 436 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 437 res->sr_slot = NULL;
13615871
AA		 438}
439
14516c3a 440static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 441{
442 unsigned long timestamp;
14516c3a 443 struct nfs_client *clp;
b0df806c
AA		 444
445 /*
446 * sr_status remains 1 if an RPC level error occurred. The server
447 * may or may not have processed the sequence operation..
448 * Proceed as if the server received and processed the sequence
449 * operation.
450 */
451 if (res->sr_status == 1)
452 res->sr_status = NFS_OK;
453
468f8613
BS		 454 /* don't increment the sequence number if the task wasn't sent */
455 if (!RPC_WAS_SENT(task))
b0df806c
AA		 456 goto out;
457
691daf3b 458 /* Check the SEQUENCE operation status */
14516c3a
TM		 459 switch (res->sr_status) {
460 case 0:
b0df806c 461 /* Update the slot's sequence and clientid lease timer */
dfb4f309 462 ++res->sr_slot->seq_nr;
b0df806c 463 timestamp = res->sr_renewal_time;
14516c3a 464 clp = res->sr_session->clp;
452e9352 465 do_renew_lease(clp, timestamp);
0629e370 466 /* Check sequence flags */
b4410c2f
TM		 467 if (res->sr_status_flags != 0)
468 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 469 break;
470 case -NFS4ERR_DELAY:
471 /* The server detected a resend of the RPC call and
472 * returned NFS4ERR_DELAY as per Section 2.10.6.2
473 * of RFC5661.
474 */
12364a4f 475 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 476 __func__,
477 res->sr_slot - res->sr_session->fc_slot_table.slots,
478 res->sr_slot->seq_nr);
14516c3a
TM		 479 goto out_retry;
480 default:
481 /* Just update the slot sequence no. */
dfb4f309 482 ++res->sr_slot->seq_nr;
b0df806c
AA		 483 }
484out:
485 /* The session may be reset by one of the error handlers. */
486 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 487 nfs41_sequence_free_slot(res);
14516c3a
TM		 488 return 1;
489out_retry:
d05dd4e9 490 if (!rpc_restart_call(task))
14516c3a
TM		 491 goto out;
492 rpc_delay(task, NFS4_POLL_RETRY_MAX);
493 return 0;
b0df806c
AA		 494}
495
14516c3a
TM		 496static int nfs4_sequence_done(struct rpc_task *task,
497 struct nfs4_sequence_res *res)
df896455 498{
14516c3a
TM		 499 if (res->sr_session == NULL)
500 return 1;
501 return nfs41_sequence_done(task, res);
df896455
TM		 502}
503
510b8175
BH		 504/*
505 * nfs4_find_slot - efficiently look for a free slot
506 *
507 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
508 * If found, we mark the slot as used, update the highest_used_slotid,
509 * and respectively set up the sequence operation args.
510 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 511 *
512 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 513 */
514static u8
40ead580 515nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 516{
517 int slotid;
518 u8 ret_id = NFS4_MAX_SLOT_TABLE;
519 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
520
510b8175
BH		 521 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
522 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
523 tbl->max_slots);
524 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
525 if (slotid >= tbl->max_slots)
526 goto out;
527 __set_bit(slotid, tbl->used_slots);
528 if (slotid > tbl->highest_used_slotid)
529 tbl->highest_used_slotid = slotid;
530 ret_id = slotid;
531out:
532 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
533 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 534 return ret_id;
535}
536
dc70d7b3 537int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 538 struct nfs4_sequence_args *args,
539 struct nfs4_sequence_res *res,
540 int cache_reply,
541 struct rpc_task *task)
542{
fbcd4abc
AA		 543 struct nfs4_slot *slot;
544 struct nfs4_slot_table *tbl;
545 u8 slotid;
546
547 dprintk("--> %s\n", __func__);
ce5039c1 548 /* slot already allocated? */
dfb4f309 549 if (res->sr_slot != NULL)
ce5039c1
AA		 550 return 0;
551
fbcd4abc
AA		 552 tbl = &session->fc_slot_table;
553
554 spin_lock(&tbl->slot_tbl_lock);
a2118c33 555 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 556 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 557 /*
558 * The state manager will wait until the slot table is empty.
559 * Schedule the reset thread
560 */
05f0d236 561 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 562 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 563 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 564 return -EAGAIN;
b069d94a
AA		 565 }
566
689cf5c1
AB		 567 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
568 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
569 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
570 spin_unlock(&tbl->slot_tbl_lock);
571 dprintk("%s enforce FIFO order\n", __func__);
572 return -EAGAIN;
573 }
574
40ead580 575 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 576 if (slotid == NFS4_MAX_SLOT_TABLE) {
577 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
578 spin_unlock(&tbl->slot_tbl_lock);
579 dprintk("<-- %s: no free slots\n", __func__);
580 return -EAGAIN;
581 }
582 spin_unlock(&tbl->slot_tbl_lock);
583
689cf5c1 584 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 585 slot = tbl->slots + slotid;
99fe60d0 586 args->sa_session = session;
fbcd4abc
AA		 587 args->sa_slotid = slotid;
588 args->sa_cache_this = cache_reply;
589
590 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
591
99fe60d0 592 res->sr_session = session;
dfb4f309 593 res->sr_slot = slot;
fbcd4abc 594 res->sr_renewal_time = jiffies;
2a6e26cd 595 res->sr_status_flags = 0;
fbcd4abc
AA		 596 /*
597 * sr_status is only set in decode_sequence, and so will remain
598 * set to 1 if an rpc level failure occurs.
599 */
600 res->sr_status = 1;
ce5039c1
AA		 601 return 0;
602}
dc70d7b3 603EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 604
035168ab 605int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 606 struct nfs4_sequence_args *args,
607 struct nfs4_sequence_res *res,
608 int cache_reply,
609 struct rpc_task *task)
610{
035168ab 611 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 612 int ret = 0;
613
035168ab
TM		 614 if (session == NULL) {
615 args->sa_session = NULL;
616 res->sr_session = NULL;
617 goto out;
618 }
619
12364a4f 620 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 621 __func__, session->clp, session, res->sr_slot ?
622 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 623
035168ab 624 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 625 task);
ce5039c1
AA		 626out:
627 dprintk("<-- %s status=%d\n", __func__, ret);
628 return ret;
629}
630
631struct nfs41_call_sync_data {
035168ab 632 const struct nfs_server *seq_server;
ce5039c1
AA		 633 struct nfs4_sequence_args *seq_args;
634 struct nfs4_sequence_res *seq_res;
635 int cache_reply;
636};
637
638static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
639{
640 struct nfs41_call_sync_data *data = calldata;
641
035168ab
TM		 642 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
643
644 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 645 data->seq_res, data->cache_reply, task))
646 return;
647 rpc_call_start(task);
648}
649
b257957e
AB		 650static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
651{
652 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
653 nfs41_call_sync_prepare(task, calldata);
654}
655
69ab40c4
AA		 656static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
657{
658 struct nfs41_call_sync_data *data = calldata;
659
14516c3a 660 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 661}
662
ce5039c1
AA		 663struct rpc_call_ops nfs41_call_sync_ops = {
664 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 665 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 666};
667
b257957e
AB		 668struct rpc_call_ops nfs41_call_priv_sync_ops = {
669 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
670 .rpc_call_done = nfs41_call_sync_done,
671};
672
7c513058
BS		 673static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
674 struct nfs_server *server,
ce5039c1
AA		 675 struct rpc_message *msg,
676 struct nfs4_sequence_args *args,
677 struct nfs4_sequence_res *res,
b257957e
AB		 678 int cache_reply,
679 int privileged)
ce5039c1
AA		 680{
681 int ret;
682 struct rpc_task *task;
683 struct nfs41_call_sync_data data = {
035168ab 684 .seq_server = server,
ce5039c1
AA		 685 .seq_args = args,
686 .seq_res = res,
687 .cache_reply = cache_reply,
688 };
689 struct rpc_task_setup task_setup = {
7c513058 690 .rpc_client = clnt,
ce5039c1
AA		 691 .rpc_message = msg,
692 .callback_ops = &nfs41_call_sync_ops,
693 .callback_data = &data
694 };
695
dfb4f309 696 res->sr_slot = NULL;
b257957e
AB		 697 if (privileged)
698 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 699 task = rpc_run_task(&task_setup);
700 if (IS_ERR(task))
701 ret = PTR_ERR(task);
702 else {
703 ret = task->tk_status;
704 rpc_put_task(task);
705 }
706 return ret;
707}
708
7c513058
BS		 709int _nfs4_call_sync_session(struct rpc_clnt *clnt,
710 struct nfs_server *server,
cccef3b9
AA		 711 struct rpc_message *msg,
712 struct nfs4_sequence_args *args,
713 struct nfs4_sequence_res *res,
714 int cache_reply)
715{
7c513058 716 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 717}
718
df896455 719#else
14516c3a
TM		 720static int nfs4_sequence_done(struct rpc_task *task,
721 struct nfs4_sequence_res *res)
df896455 722{
14516c3a 723 return 1;
df896455 724}
cccef3b9
AA		 725#endif /* CONFIG_NFS_V4_1 */
726
7c513058
BS		 727int _nfs4_call_sync(struct rpc_clnt *clnt,
728 struct nfs_server *server,
cccef3b9
AA		 729 struct rpc_message *msg,
730 struct nfs4_sequence_args *args,
731 struct nfs4_sequence_res *res,
732 int cache_reply)
733{
f3752975 734 args->sa_session = res->sr_session = NULL;
7c513058 735 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 736}
737
e73b83f2 738static inline
7c513058
BS		 739int nfs4_call_sync(struct rpc_clnt *clnt,
740 struct nfs_server *server,
e73b83f2
BS		 741 struct rpc_message *msg,
742 struct nfs4_sequence_args *args,
743 struct nfs4_sequence_res *res,
744 int cache_reply)
745{
7c513058
BS		 746 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
747 args, res, cache_reply);
e73b83f2 748}
cccef3b9 749
38478b24 750static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 751{
38478b24 752 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 753
38478b24 754 spin_lock(&dir->i_lock);
40d24704
TM		 755 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
756 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 757 nfs_force_lookup_revalidate(dir);
40d24704 758 nfsi->change_attr = cinfo->after;
38478b24 759 spin_unlock(&dir->i_lock);
1da177e4
LT		 760}
761
e56e0b78 762struct nfs4_opendata {
c6d00e63 763 struct kref kref;
e56e0b78
TM		 764 struct nfs_openargs o_arg;
765 struct nfs_openres o_res;
cdd4e68b
TM		 766 struct nfs_open_confirmargs c_arg;
767 struct nfs_open_confirmres c_res;
e56e0b78
TM		 768 struct nfs_fattr f_attr;
769 struct nfs_fattr dir_attr;
e56e0b78 770 struct dentry *dir;
82a2c1b7 771 struct dentry *dentry;
e56e0b78 772 struct nfs4_state_owner *owner;
aac00a8d 773 struct nfs4_state *state;
e56e0b78 774 struct iattr attrs;
26e976a8 775 unsigned long timestamp;
3e309914 776 unsigned int rpc_done : 1;
24ac23ab
TM		 777 int rpc_status;
778 int cancelled;
e56e0b78
TM		 779};
780
2ced46c2
TM		 781
782static void nfs4_init_opendata_res(struct nfs4_opendata *p)
783{
784 p->o_res.f_attr = &p->f_attr;
785 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 786 p->o_res.seqid = p->o_arg.seqid;
787 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 788 p->o_res.server = p->o_arg.server;
789 nfs_fattr_init(&p->f_attr);
790 nfs_fattr_init(&p->dir_attr);
791}
792
82a2c1b7 793static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 794 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 795 const struct iattr *attrs,
796 gfp_t gfp_mask)
e56e0b78 797{
82a2c1b7 798 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 799 struct inode *dir = parent->d_inode;
800 struct nfs_server *server = NFS_SERVER(dir);
801 struct nfs4_opendata *p;
802
8535b2be 803 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 804 if (p == NULL)
805 goto err;
8535b2be 806 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 807 if (p->o_arg.seqid == NULL)
808 goto err_free;
82a2c1b7
AV		 809 nfs_sb_active(dentry->d_sb);
810 p->dentry = dget(dentry);
e56e0b78
TM		 811 p->dir = parent;
812 p->owner = sp;
813 atomic_inc(&sp->so_count);
814 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 815 p->o_arg.open_flags = flags;
816 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 817 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 818 p->o_arg.id = sp->so_owner_id.id;
82a2c1b7 819 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 820 p->o_arg.server = server;
821 p->o_arg.bitmask = server->attr_bitmask;
822 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 823 if (flags & O_CREAT) {
824 u32 *s;
825
e56e0b78
TM		 826 p->o_arg.u.attrs = &p->attrs;
827 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 828 s = (u32 *) p->o_arg.u.verifier.data;
829 s[0] = jiffies;
830 s[1] = current->pid;
e56e0b78 831 }
cdd4e68b
TM		 832 p->c_arg.fh = &p->o_res.fh;
833 p->c_arg.stateid = &p->o_res.stateid;
834 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 835 nfs4_init_opendata_res(p);
c6d00e63 836 kref_init(&p->kref);
e56e0b78
TM		 837 return p;
838err_free:
839 kfree(p);
840err:
841 dput(parent);
842 return NULL;
843}
844
c6d00e63 845static void nfs4_opendata_free(struct kref *kref)
e56e0b78 846{
c6d00e63
TM		 847 struct nfs4_opendata *p = container_of(kref,
848 struct nfs4_opendata, kref);
82a2c1b7 849 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 850
851 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 852 if (p->state != NULL)
853 nfs4_put_open_state(p->state);
c6d00e63
TM		 854 nfs4_put_state_owner(p->owner);
855 dput(p->dir);
82a2c1b7
AV		 856 dput(p->dentry);
857 nfs_sb_deactive(sb);
c6d00e63
TM		 858 kfree(p);
859}
860
861static void nfs4_opendata_put(struct nfs4_opendata *p)
862{
863 if (p != NULL)
864 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 865}
866
06f814a3
TM		 867static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
868{
06f814a3
TM		 869 int ret;
870
06f814a3 871 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 872 return ret;
873}
874
dc0b027d 875static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 876{
877 int ret = 0;
dc0b027d
TM		 878
879 if (open_mode & O_EXCL)
880 goto out;
881 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 882 case FMODE_READ:
88069f77
TM		 883 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
884 && state->n_rdonly != 0;
6ee41268
TM		 885 break;
886 case FMODE_WRITE:
88069f77
TM		 887 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
888 && state->n_wronly != 0;
6ee41268
TM		 889 break;
890 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 891 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
892 && state->n_rdwr != 0;
6ee41268 893 }
dc0b027d 894out:
6ee41268
TM		 895 return ret;
896}
897
dc0b027d 898static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 899{
dc0b027d 900 if ((delegation->type & fmode) != fmode)
aac00a8d 901 return 0;
15c831bf 902 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 903 return 0;
b7391f44 904 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 905 return 1;
906}
907
dc0b027d 908static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 909{
dc0b027d 910 switch (fmode) {
e7616923
TM		 911 case FMODE_WRITE:
912 state->n_wronly++;
913 break;
914 case FMODE_READ:
915 state->n_rdonly++;
916 break;
917 case FMODE_READ|FMODE_WRITE:
918 state->n_rdwr++;
919 }
dc0b027d 920 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 921}
922
dc0b027d 923static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 924{
925 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
926 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
927 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 928 switch (fmode) {
003707c7
TM		 929 case FMODE_READ:
930 set_bit(NFS_O_RDONLY_STATE, &state->flags);
931 break;
932 case FMODE_WRITE:
933 set_bit(NFS_O_WRONLY_STATE, &state->flags);
934 break;
935 case FMODE_READ|FMODE_WRITE:
936 set_bit(NFS_O_RDWR_STATE, &state->flags);
937 }
e7616923
TM		 938}
939
dc0b027d 940static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 941{
8bda4e4c 942 write_seqlock(&state->seqlock);
dc0b027d 943 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 944 write_sequnlock(&state->seqlock);
003707c7
TM		 945}
946
dc0b027d 947static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 948{
8bda4e4c
TM		 949 /*
950 * Protect the call to nfs4_state_set_mode_locked and
951 * serialise the stateid update
952 */
953 write_seqlock(&state->seqlock);
003707c7
TM		 954 if (deleg_stateid != NULL) {
955 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
956 set_bit(NFS_DELEGATED_STATE, &state->flags);
957 }
958 if (open_stateid != NULL)
dc0b027d 959 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 960 write_sequnlock(&state->seqlock);
961 spin_lock(&state->owner->so_lock);
dc0b027d 962 update_open_stateflags(state, fmode);
ec073428 963 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 964}
965
dc0b027d 966static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 967{
968 struct nfs_inode *nfsi = NFS_I(state->inode);
969 struct nfs_delegation *deleg_cur;
970 int ret = 0;
971
dc0b027d 972 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 973
974 rcu_read_lock();
975 deleg_cur = rcu_dereference(nfsi->delegation);
976 if (deleg_cur == NULL)
977 goto no_delegation;
978
979 spin_lock(&deleg_cur->lock);
980 if (nfsi->delegation != deleg_cur ||
dc0b027d 981 (deleg_cur->type & fmode) != fmode)
34310430
TM		 982 goto no_delegation_unlock;
983
984 if (delegation == NULL)
985 delegation = &deleg_cur->stateid;
986 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
987 goto no_delegation_unlock;
988
b7391f44 989 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 990 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 991 ret = 1;
992no_delegation_unlock:
993 spin_unlock(&deleg_cur->lock);
994no_delegation:
995 rcu_read_unlock();
996
997 if (!ret && open_stateid != NULL) {
dc0b027d 998 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 999 ret = 1;
1000 }
1001
1002 return ret;
1003}
1004
1005
dc0b027d 1006static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1007{
1008 struct nfs_delegation *delegation;
1009
1010 rcu_read_lock();
1011 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1012 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1013 rcu_read_unlock();
1014 return;
1015 }
1016 rcu_read_unlock();
1017 nfs_inode_return_delegation(inode);
1018}
1019
6ee41268 1020static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1021{
1022 struct nfs4_state *state = opendata->state;
1023 struct nfs_inode *nfsi = NFS_I(state->inode);
1024 struct nfs_delegation *delegation;
dc0b027d
TM		 1025 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1026 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1027 nfs4_stateid stateid;
1028 int ret = -EAGAIN;
1029
aac00a8d 1030 for (;;) {
dc0b027d 1031 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1032 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1033 if (can_open_cached(state, fmode, open_mode)) {
1034 update_open_stateflags(state, fmode);
6ee41268 1035 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1036 goto out_return_state;
1037 }
1038 spin_unlock(&state->owner->so_lock);
1039 }
34310430
TM		 1040 rcu_read_lock();
1041 delegation = rcu_dereference(nfsi->delegation);
1042 if (delegation == NULL ||
dc0b027d 1043 !can_open_delegated(delegation, fmode)) {
34310430 1044 rcu_read_unlock();
aac00a8d 1045 break;
34310430 1046 }
aac00a8d
TM		 1047 /* Save the delegation */
1048 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1049 rcu_read_unlock();
af22f94a 1050 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1051 if (ret != 0)
1052 goto out;
1053 ret = -EAGAIN;
34310430
TM		 1054
1055 /* Try to update the stateid using the delegation */
dc0b027d 1056 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1057 goto out_return_state;
aac00a8d 1058 }
aac00a8d
TM		 1059out:
1060 return ERR_PTR(ret);
1061out_return_state:
1062 atomic_inc(&state->count);
1063 return state;
1064}
1065
24ac23ab
TM		 1066static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1067{
1068 struct inode *inode;
1069 struct nfs4_state *state = NULL;
003707c7 1070 struct nfs_delegation *delegation;
1b370bc2 1071 int ret;
24ac23ab 1072
aac00a8d 1073 if (!data->rpc_done) {
6ee41268 1074 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1075 goto out;
1076 }
1077
1b370bc2 1078 ret = -EAGAIN;
24ac23ab 1079 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1080 goto err;
24ac23ab 1081 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1082 ret = PTR_ERR(inode);
03f28e3a 1083 if (IS_ERR(inode))
1b370bc2
TM		 1084 goto err;
1085 ret = -ENOMEM;
24ac23ab
TM		 1086 state = nfs4_get_open_state(inode, data->owner);
1087 if (state == NULL)
1b370bc2 1088 goto err_put_inode;
549d6ed5 1089 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1090 int delegation_flags = 0;
1091
003707c7
TM		 1092 rcu_read_lock();
1093 delegation = rcu_dereference(NFS_I(inode)->delegation);
1094 if (delegation)
1095 delegation_flags = delegation->flags;
1096 rcu_read_unlock();
15c831bf 1097 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1098 nfs_inode_set_delegation(state->inode,
1099 data->owner->so_cred,
1100 &data->o_res);
1101 else
1102 nfs_inode_reclaim_delegation(state->inode,
1103 data->owner->so_cred,
1104 &data->o_res);
1105 }
34310430
TM		 1106
1107 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1108 data->o_arg.fmode);
24ac23ab 1109 iput(inode);
aac00a8d 1110out:
24ac23ab 1111 return state;
1b370bc2
TM		 1112err_put_inode:
1113 iput(inode);
1114err:
1115 return ERR_PTR(ret);
24ac23ab
TM		 1116}
1117
864472e9
TM		 1118static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1119{
1120 struct nfs_inode *nfsi = NFS_I(state->inode);
1121 struct nfs_open_context *ctx;
1122
1123 spin_lock(&state->inode->i_lock);
1124 list_for_each_entry(ctx, &nfsi->open_files, list) {
1125 if (ctx->state != state)
1126 continue;
1127 get_nfs_open_context(ctx);
1128 spin_unlock(&state->inode->i_lock);
1129 return ctx;
1130 }
1131 spin_unlock(&state->inode->i_lock);
1132 return ERR_PTR(-ENOENT);
1133}
1134
6f220ed5
TM		 1135static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1136{
1137 struct nfs4_opendata *opendata;
1138
3d4ff43d 1139 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1140 if (opendata == NULL)
1141 return ERR_PTR(-ENOMEM);
1142 opendata->state = state;
1143 atomic_inc(&state->count);
1144 return opendata;
1145}
1146
dc0b027d 1147static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1148{
2ced46c2 1149 struct nfs4_state *newstate;
864472e9
TM		 1150 int ret;
1151
dc0b027d
TM		 1152 opendata->o_arg.open_flags = 0;
1153 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1154 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1155 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1156 nfs4_init_opendata_res(opendata);
b257957e 1157 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1158 if (ret != 0)
1159 return ret;
2ced46c2 1160 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1161 if (IS_ERR(newstate))
1162 return PTR_ERR(newstate);
643168c2 1163 nfs4_close_state(newstate, fmode);
2ced46c2 1164 *res = newstate;
864472e9
TM		 1165 return 0;
1166}
1167
1168static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1169{
864472e9 1170 struct nfs4_state *newstate;
864472e9
TM		 1171 int ret;
1172
1173 /* memory barrier prior to reading state->n_* */
2ced46c2 1174 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1175 smp_rmb();
1176 if (state->n_rdwr != 0) {
b0ed9dbc 1177 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1178 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1179 if (ret != 0)
1180 return ret;
2ced46c2
TM		 1181 if (newstate != state)
1182 return -ESTALE;
864472e9
TM		 1183 }
1184 if (state->n_wronly != 0) {
b0ed9dbc 1185 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1186 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1187 if (ret != 0)
1188 return ret;
2ced46c2
TM		 1189 if (newstate != state)
1190 return -ESTALE;
864472e9
TM		 1191 }
1192 if (state->n_rdonly != 0) {
b0ed9dbc 1193 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1194 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1195 if (ret != 0)
1196 return ret;
2ced46c2
TM		 1197 if (newstate != state)
1198 return -ESTALE;
864472e9 1199 }
1ac7e2fd
TM		 1200 /*
1201 * We may have performed cached opens for all three recoveries.
1202 * Check if we need to update the current stateid.
1203 */
1204 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1205 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1206 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1207 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1208 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1209 write_sequnlock(&state->seqlock);
1ac7e2fd 1210 }
864472e9
TM		 1211 return 0;
1212}
1213
1da177e4
LT		 1214/*
1215 * OPEN_RECLAIM:
1216 * reclaim state on the server after a reboot.
1da177e4 1217 */
539cd03a 1218static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1219{
1ac7e2fd 1220 struct nfs_delegation *delegation;
864472e9 1221 struct nfs4_opendata *opendata;
dc0b027d 1222 fmode_t delegation_type = 0;
1da177e4
LT		 1223 int status;
1224
6f220ed5
TM		 1225 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1226 if (IS_ERR(opendata))
1227 return PTR_ERR(opendata);
864472e9
TM		 1228 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1229 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1230 rcu_read_lock();
1231 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1232 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1233 delegation_type = delegation->type;
1ac7e2fd 1234 rcu_read_unlock();
864472e9
TM		 1235 opendata->o_arg.u.delegation_type = delegation_type;
1236 status = nfs4_open_recover(opendata, state);
c6d00e63 1237 nfs4_opendata_put(opendata);
1da177e4
LT		 1238 return status;
1239}
1240
539cd03a 1241static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1242{
1243 struct nfs_server *server = NFS_SERVER(state->inode);
1244 struct nfs4_exception exception = { };
1245 int err;
1246 do {
539cd03a 1247 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1248 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1249 break;
1250 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1251 } while (exception.retry);
1252 return err;
1253}
1254
864472e9
TM		 1255static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1256{
1257 struct nfs_open_context *ctx;
1258 int ret;
1259
1260 ctx = nfs4_state_find_open_context(state);
1261 if (IS_ERR(ctx))
1262 return PTR_ERR(ctx);
539cd03a 1263 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1264 put_nfs_open_context(ctx);
1265 return ret;
1266}
1267
13437e12 1268static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1269{
e56e0b78 1270 struct nfs4_opendata *opendata;
864472e9 1271 int ret;
1da177e4 1272
6f220ed5
TM		 1273 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1274 if (IS_ERR(opendata))
1275 return PTR_ERR(opendata);
e56e0b78 1276 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1277 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1278 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1279 ret = nfs4_open_recover(opendata, state);
c6d00e63 1280 nfs4_opendata_put(opendata);
864472e9 1281 return ret;
1da177e4
LT		 1282}
1283
13437e12 1284int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1285{
1286 struct nfs4_exception exception = { };
539cd03a 1287 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1288 int err;
1289 do {
13437e12 1290 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1291 switch (err) {
1292 case 0:
965b5d67
TM		 1293 case -ENOENT:
1294 case -ESTALE:
1295 goto out;
bcfa49f6
RL		 1296 case -NFS4ERR_BADSESSION:
1297 case -NFS4ERR_BADSLOT:
1298 case -NFS4ERR_BAD_HIGH_SLOT:
1299 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1300 case -NFS4ERR_DEADSESSION:
0400a6b0 1301 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
bcfa49f6 1302 goto out;
1da177e4
LT		 1303 case -NFS4ERR_STALE_CLIENTID:
1304 case -NFS4ERR_STALE_STATEID:
1305 case -NFS4ERR_EXPIRED:
1306 /* Don't recall a delegation if it was lost */
0400a6b0 1307 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1308 goto out;
1309 case -ERESTARTSYS:
1310 /*
1311 * The show must go on: exit, but mark the
1312 * stateid as needing recovery.
1313 */
1314 case -NFS4ERR_ADMIN_REVOKED:
1315 case -NFS4ERR_BAD_STATEID:
0400a6b0 1316 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1317 case -EKEYEXPIRED:
1318 /*
1319 * User RPCSEC_GSS context has expired.
1320 * We cannot recover this stateid now, so
1321 * skip it and allow recovery thread to
1322 * proceed.
1323 */
965b5d67
TM		 1324 case -ENOMEM:
1325 err = 0;
1326 goto out;
1da177e4
LT		 1327 }
1328 err = nfs4_handle_exception(server, err, &exception);
1329 } while (exception.retry);
965b5d67 1330out:
1da177e4
LT		 1331 return err;
1332}
1333
cdd4e68b
TM		 1334static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1335{
1336 struct nfs4_opendata *data = calldata;
1337
1338 data->rpc_status = task->tk_status;
26e976a8 1339 if (data->rpc_status == 0) {
cdd4e68b
TM		 1340 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1341 sizeof(data->o_res.stateid.data));
bb22629e 1342 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1343 renew_lease(data->o_res.server, data->timestamp);
3e309914 1344 data->rpc_done = 1;
26e976a8 1345 }
cdd4e68b
TM		 1346}
1347
1348static void nfs4_open_confirm_release(void *calldata)
1349{
1350 struct nfs4_opendata *data = calldata;
1351 struct nfs4_state *state = NULL;
1352
1353 /* If this request hasn't been cancelled, do nothing */
1354 if (data->cancelled == 0)
1355 goto out_free;
1356 /* In case of error, no cleanup! */
3e309914 1357 if (!data->rpc_done)
cdd4e68b 1358 goto out_free;
cdd4e68b 1359 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1360 if (!IS_ERR(state))
643168c2 1361 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1362out_free:
c6d00e63 1363 nfs4_opendata_put(data);
cdd4e68b
TM		 1364}
1365
1366static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1367 .rpc_call_done = nfs4_open_confirm_done,
1368 .rpc_release = nfs4_open_confirm_release,
1369};
1370
1371/*
1372 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1373 */
1374static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1375{
1376 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1377 struct rpc_task *task;
5138fde0
TM		 1378 struct rpc_message msg = {
1379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1380 .rpc_argp = &data->c_arg,
1381 .rpc_resp = &data->c_res,
1382 .rpc_cred = data->owner->so_cred,
1383 };
c970aa85
TM		 1384 struct rpc_task_setup task_setup_data = {
1385 .rpc_client = server->client,
5138fde0 1386 .rpc_message = &msg,
c970aa85
TM		 1387 .callback_ops = &nfs4_open_confirm_ops,
1388 .callback_data = data,
101070ca 1389 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1390 .flags = RPC_TASK_ASYNC,
1391 };
1da177e4
LT		 1392 int status;
1393
c6d00e63 1394 kref_get(&data->kref);
3e309914
TM		 1395 data->rpc_done = 0;
1396 data->rpc_status = 0;
5138fde0 1397 data->timestamp = jiffies;
c970aa85 1398 task = rpc_run_task(&task_setup_data);
7a1218a2 1399 if (IS_ERR(task))
cdd4e68b 1400 return PTR_ERR(task);
cdd4e68b
TM		 1401 status = nfs4_wait_for_completion_rpc_task(task);
1402 if (status != 0) {
1403 data->cancelled = 1;
1404 smp_wmb();
1405 } else
1406 status = data->rpc_status;
e6b3c4db 1407 rpc_put_task(task);
1da177e4
LT		 1408 return status;
1409}
1410
24ac23ab 1411static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1412{
24ac23ab
TM		 1413 struct nfs4_opendata *data = calldata;
1414 struct nfs4_state_owner *sp = data->owner;
5138fde0 1415
24ac23ab
TM		 1416 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1417 return;
aac00a8d
TM		 1418 /*
1419 * Check if we still need to send an OPEN call, or if we can use
1420 * a delegation instead.
1421 */
1422 if (data->state != NULL) {
1423 struct nfs_delegation *delegation;
1424
dc0b027d 1425 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1426 goto out_no_action;
aac00a8d
TM		 1427 rcu_read_lock();
1428 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1429 if (delegation != NULL &&
15c831bf 1430 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1431 rcu_read_unlock();
6ee41268 1432 goto out_no_action;
aac00a8d
TM		 1433 }
1434 rcu_read_unlock();
1435 }
24ac23ab 1436 /* Update sequence id. */
9f958ab8 1437 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1438 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1439 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1440 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1441 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1442 }
26e976a8 1443 data->timestamp = jiffies;
035168ab 1444 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1445 &data->o_arg.seq_args,
1446 &data->o_res.seq_res, 1, task))
1447 return;
5138fde0 1448 rpc_call_start(task);
6ee41268
TM		 1449 return;
1450out_no_action:
1451 task->tk_action = NULL;
1452
24ac23ab 1453}
1da177e4 1454
b257957e
AB		 1455static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1456{
1457 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1458 nfs4_open_prepare(task, calldata);
1459}
1460
24ac23ab
TM		 1461static void nfs4_open_done(struct rpc_task *task, void *calldata)
1462{
1463 struct nfs4_opendata *data = calldata;
1da177e4 1464
24ac23ab 1465 data->rpc_status = task->tk_status;
d898528c 1466
14516c3a
TM		 1467 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1468 return;
d898528c 1469
24ac23ab
TM		 1470 if (task->tk_status == 0) {
1471 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1472 case S_IFREG:
1473 break;
1474 case S_IFLNK:
24ac23ab 1475 data->rpc_status = -ELOOP;
6f926b5b
TM		 1476 break;
1477 case S_IFDIR:
24ac23ab 1478 data->rpc_status = -EISDIR;
6f926b5b
TM		 1479 break;
1480 default:
24ac23ab 1481 data->rpc_status = -ENOTDIR;
6f926b5b 1482 }
26e976a8 1483 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1484 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1485 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1486 }
3e309914 1487 data->rpc_done = 1;
24ac23ab 1488}
6f926b5b 1489
24ac23ab
TM		 1490static void nfs4_open_release(void *calldata)
1491{
1492 struct nfs4_opendata *data = calldata;
1493 struct nfs4_state *state = NULL;
1494
1495 /* If this request hasn't been cancelled, do nothing */
1496 if (data->cancelled == 0)
1497 goto out_free;
1498 /* In case of error, no cleanup! */
3e309914 1499 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1500 goto out_free;
1501 /* In case we need an open_confirm, no cleanup! */
1502 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1503 goto out_free;
24ac23ab 1504 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1505 if (!IS_ERR(state))
643168c2 1506 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1507out_free:
c6d00e63 1508 nfs4_opendata_put(data);
24ac23ab
TM		 1509}
1510
1511static const struct rpc_call_ops nfs4_open_ops = {
1512 .rpc_call_prepare = nfs4_open_prepare,
1513 .rpc_call_done = nfs4_open_done,
1514 .rpc_release = nfs4_open_release,
1515};
1516
b257957e
AB		 1517static const struct rpc_call_ops nfs4_recover_open_ops = {
1518 .rpc_call_prepare = nfs4_recover_open_prepare,
1519 .rpc_call_done = nfs4_open_done,
1520 .rpc_release = nfs4_open_release,
1521};
1522
1523static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1524{
1525 struct inode *dir = data->dir->d_inode;
1526 struct nfs_server *server = NFS_SERVER(dir);
1527 struct nfs_openargs *o_arg = &data->o_arg;
1528 struct nfs_openres *o_res = &data->o_res;
1529 struct rpc_task *task;
5138fde0
TM		 1530 struct rpc_message msg = {
1531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1532 .rpc_argp = o_arg,
1533 .rpc_resp = o_res,
1534 .rpc_cred = data->owner->so_cred,
1535 };
c970aa85
TM		 1536 struct rpc_task_setup task_setup_data = {
1537 .rpc_client = server->client,
5138fde0 1538 .rpc_message = &msg,
c970aa85
TM		 1539 .callback_ops = &nfs4_open_ops,
1540 .callback_data = data,
101070ca 1541 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1542 .flags = RPC_TASK_ASYNC,
1543 };
24ac23ab
TM		 1544 int status;
1545
c6d00e63 1546 kref_get(&data->kref);
3e309914
TM		 1547 data->rpc_done = 0;
1548 data->rpc_status = 0;
2ced46c2 1549 data->cancelled = 0;
b257957e
AB		 1550 if (isrecover)
1551 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1552 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1553 if (IS_ERR(task))
1554 return PTR_ERR(task);
1555 status = nfs4_wait_for_completion_rpc_task(task);
1556 if (status != 0) {
1557 data->cancelled = 1;
1558 smp_wmb();
1559 } else
1560 status = data->rpc_status;
1561 rpc_put_task(task);
1562
1563 return status;
1564}
1565
1566static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1567{
1568 struct inode *dir = data->dir->d_inode;
1569 struct nfs_openres *o_res = &data->o_res;
1570 int status;
1571
1572 status = nfs4_run_open_task(data, 1);
1573 if (status != 0 || !data->rpc_done)
1574 return status;
1575
1576 nfs_refresh_inode(dir, o_res->dir_attr);
1577
1578 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1579 status = _nfs4_proc_open_confirm(data);
1580 if (status != 0)
1581 return status;
1582 }
1583
1584 return status;
1585}
1586
1587/*
1588 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1589 */
1590static int _nfs4_proc_open(struct nfs4_opendata *data)
1591{
1592 struct inode *dir = data->dir->d_inode;
1593 struct nfs_server *server = NFS_SERVER(dir);
1594 struct nfs_openargs *o_arg = &data->o_arg;
1595 struct nfs_openres *o_res = &data->o_res;
1596 int status;
1597
1598 status = nfs4_run_open_task(data, 0);
3e309914 1599 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1600 return status;
1601
56ae19f3
TM		 1602 if (o_arg->open_flags & O_CREAT) {
1603 update_changeattr(dir, &o_res->cinfo);
1604 nfs_post_op_update_inode(dir, o_res->dir_attr);
1605 } else
1606 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1607 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1608 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1609 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1610 status = _nfs4_proc_open_confirm(data);
1da177e4 1611 if (status != 0)
24ac23ab 1612 return status;
1da177e4
LT		 1613 }
1614 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1615 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1616 return 0;
1da177e4
LT		 1617}
1618
d83217c1 1619static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1620{
a78cb57a 1621 unsigned int loop;
6b30954e 1622 int ret;
58d9714a 1623
a78cb57a 1624 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1625 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1626 if (ret != 0)
a78cb57a 1627 break;
e598d843
TM		 1628 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1629 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1630 break;
0400a6b0 1631 nfs4_schedule_state_manager(clp);
a78cb57a 1632 ret = -EIO;
6b30954e 1633 }
a78cb57a 1634 return ret;
58d9714a
TM		 1635}
1636
d83217c1
AA		 1637static int nfs4_recover_expired_lease(struct nfs_server *server)
1638{
1639 return nfs4_client_recover_expired_lease(server->nfs_client);
1640}
1641
1da177e4
LT		 1642/*
1643 * OPEN_EXPIRED:
1644 * reclaim state on the server after a network partition.
1645 * Assumes caller holds the appropriate lock
1646 */
539cd03a 1647static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1648{
e56e0b78 1649 struct nfs4_opendata *opendata;
864472e9 1650 int ret;
1da177e4 1651
6f220ed5
TM		 1652 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1653 if (IS_ERR(opendata))
1654 return PTR_ERR(opendata);
864472e9 1655 ret = nfs4_open_recover(opendata, state);
35d05778 1656 if (ret == -ESTALE)
3d4ff43d 1657 d_drop(ctx->dentry);
c6d00e63 1658 nfs4_opendata_put(opendata);
864472e9 1659 return ret;
1da177e4
LT		 1660}
1661
a9ed2e25 1662static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1663{
539cd03a 1664 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1665 struct nfs4_exception exception = { };
1666 int err;
1667
1668 do {
539cd03a 1669 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1670 switch (err) {
1671 default:
1672 goto out;
1673 case -NFS4ERR_GRACE:
1674 case -NFS4ERR_DELAY:
1675 nfs4_handle_exception(server, err, &exception);
1676 err = 0;
1677 }
202b50dc 1678 } while (exception.retry);
a9ed2e25 1679out:
202b50dc
TM		 1680 return err;
1681}
1682
1da177e4
LT		 1683static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1684{
1da177e4 1685 struct nfs_open_context *ctx;
864472e9 1686 int ret;
1da177e4 1687
864472e9
TM		 1688 ctx = nfs4_state_find_open_context(state);
1689 if (IS_ERR(ctx))
1690 return PTR_ERR(ctx);
539cd03a 1691 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1692 put_nfs_open_context(ctx);
1693 return ret;
1da177e4
LT		 1694}
1695
f062eb6c
BS		 1696#if defined(CONFIG_NFS_V4_1)
1697static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1698{
1699 int status;
1700 struct nfs_server *server = NFS_SERVER(state->inode);
1701
1702 status = nfs41_test_stateid(server, state);
1703 if (status == NFS_OK)
1704 return 0;
1705 nfs41_free_stateid(server, state);
1706 return nfs4_open_expired(sp, state);
1707}
1708#endif
1709
aa53ed54
JL		 1710/*
1711 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1712 * fields corresponding to attributes that were used to store the verifier.
1713 * Make sure we clobber those fields in the later setattr call
1714 */
1715static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1716{
1717 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1718 !(sattr->ia_valid & ATTR_ATIME_SET))
1719 sattr->ia_valid |= ATTR_ATIME;
1720
1721 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1722 !(sattr->ia_valid & ATTR_MTIME_SET))
1723 sattr->ia_valid |= ATTR_MTIME;
1724}
1725
1da177e4 1726/*
24ac23ab 1727 * Returns a referenced nfs4_state
1da177e4 1728 */
82a2c1b7 1729static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1730{
1731 struct nfs4_state_owner *sp;
1732 struct nfs4_state *state = NULL;
1733 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1734 struct nfs4_opendata *opendata;
aac00a8d 1735 int status;
1da177e4
LT		 1736
1737 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1738 status = -ENOMEM;
1739 if (!(sp = nfs4_get_state_owner(server, cred))) {
1740 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1741 goto out_err;
1742 }
58d9714a
TM		 1743 status = nfs4_recover_expired_lease(server);
1744 if (status != 0)
b4454fe1 1745 goto err_put_state_owner;
82a2c1b7
AV		 1746 if (dentry->d_inode != NULL)
1747 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1748 status = -ENOMEM;
82a2c1b7 1749 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1750 if (opendata == NULL)
95d35cb4 1751 goto err_put_state_owner;
1da177e4 1752
82a2c1b7
AV		 1753 if (dentry->d_inode != NULL)
1754 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1755
24ac23ab 1756 status = _nfs4_proc_open(opendata);
1da177e4 1757 if (status != 0)
c6d00e63 1758 goto err_opendata_put;
1da177e4 1759
24ac23ab 1760 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1761 status = PTR_ERR(state);
1762 if (IS_ERR(state))
c6d00e63 1763 goto err_opendata_put;
0df5dd4a 1764 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1765 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1766
1767 if (opendata->o_arg.open_flags & O_EXCL) {
1768 nfs4_exclusive_attrset(opendata, sattr);
1769
1770 nfs_fattr_init(opendata->o_res.f_attr);
1771 status = nfs4_do_setattr(state->inode, cred,
1772 opendata->o_res.f_attr, sattr,
1773 state);
1774 if (status == 0)
1775 nfs_setattr_update_inode(state->inode, sattr);
1776 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1777 }
c6d00e63 1778 nfs4_opendata_put(opendata);
1da177e4 1779 nfs4_put_state_owner(sp);
1da177e4
LT		 1780 *res = state;
1781 return 0;
c6d00e63
TM		 1782err_opendata_put:
1783 nfs4_opendata_put(opendata);
e56e0b78
TM		 1784err_put_state_owner:
1785 nfs4_put_state_owner(sp);
1da177e4 1786out_err:
1da177e4
LT		 1787 *res = NULL;
1788 return status;
1789}
1790
1791
82a2c1b7 1792static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1793{
1794 struct nfs4_exception exception = { };
1795 struct nfs4_state *res;
1796 int status;
1797
1798 do {
82a2c1b7 1799 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1800 if (status == 0)
1801 break;
1802 /* NOTE: BAD_SEQID means the server and client disagree about the
1803 * book-keeping w.r.t. state-changing operations
1804 * (OPEN/CLOSE/LOCK/LOCKU...)
1805 * It is actually a sign of a bug on the client or on the server.
1806 *
1807 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1808 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1809 * have unhashed the old state_owner for us, and that we can
1810 * therefore safely retry using a new one. We should still warn
1811 * the user though...
1812 */
1813 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1814 printk(KERN_WARNING "NFS: v4 server %s "
1815 " returned a bad sequence-id error!\n",
1816 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1817 exception.retry = 1;
1818 continue;
1819 }
550f5747
TM		 1820 /*
1821 * BAD_STATEID on OPEN means that the server cancelled our
1822 * state before it received the OPEN_CONFIRM.
1823 * Recover by retrying the request as per the discussion
1824 * on Page 181 of RFC3530.
1825 */
1826 if (status == -NFS4ERR_BAD_STATEID) {
1827 exception.retry = 1;
1828 continue;
1829 }
aac00a8d
TM		 1830 if (status == -EAGAIN) {
1831 /* We must have found a delegation */
1832 exception.retry = 1;
1833 continue;
1834 }
1da177e4
LT		 1835 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1836 status, &exception));
1837 } while (exception.retry);
1838 return res;
1839}
1840
659bfcd6
TM		 1841static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1842 struct nfs_fattr *fattr, struct iattr *sattr,
1843 struct nfs4_state *state)
1da177e4 1844{
3e4f6290 1845 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1846 struct nfs_setattrargs arg = {
3e4f6290 1847 .fh = NFS_FH(inode),
1da177e4
LT		 1848 .iap = sattr,
1849 .server = server,
1850 .bitmask = server->attr_bitmask,
1851 };
1852 struct nfs_setattrres res = {
1853 .fattr = fattr,
1854 .server = server,
1855 };
1856 struct rpc_message msg = {
659bfcd6
TM		 1857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1858 .rpc_argp = &arg,
1859 .rpc_resp = &res,
1860 .rpc_cred = cred,
1da177e4 1861 };
26e976a8 1862 unsigned long timestamp = jiffies;
65e4308d 1863 int status;
1da177e4 1864
0e574af1 1865 nfs_fattr_init(fattr);
1da177e4 1866
3e4f6290
TM		 1867 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1868 /* Use that stateid */
1869 } else if (state != NULL) {
77041ed9 1870 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1871 } else
1da177e4
LT		 1872 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1873
7c513058 1874 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1875 if (status == 0 && state != NULL)
1876 renew_lease(server, timestamp);
65e4308d 1877 return status;
1da177e4
LT		 1878}
1879
659bfcd6
TM		 1880static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1881 struct nfs_fattr *fattr, struct iattr *sattr,
1882 struct nfs4_state *state)
1da177e4 1883{
3e4f6290 1884 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1885 struct nfs4_exception exception = { };
1886 int err;
1887 do {
1888 err = nfs4_handle_exception(server,
659bfcd6 1889 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1890 &exception);
1891 } while (exception.retry);
1892 return err;
1893}
1894
1895struct nfs4_closedata {
1896 struct inode *inode;
1897 struct nfs4_state *state;
1898 struct nfs_closeargs arg;
1899 struct nfs_closeres res;
516a6af6 1900 struct nfs_fattr fattr;
26e976a8 1901 unsigned long timestamp;
f7e8917a
FI		 1902 bool roc;
1903 u32 roc_barrier;
1da177e4
LT		 1904};
1905
963d8fe5 1906static void nfs4_free_closedata(void *data)
9512135d 1907{
963d8fe5
TM		 1908 struct nfs4_closedata *calldata = data;
1909 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 1910 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 1911
f7e8917a
FI		 1912 if (calldata->roc)
1913 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1914 nfs4_put_open_state(calldata->state);
1915 nfs_free_seqid(calldata->arg.seqid);
9512135d 1916 nfs4_put_state_owner(sp);
643168c2 1917 nfs_sb_deactive(sb);
9512135d
TM		 1918 kfree(calldata);
1919}
1920
88069f77
TM		 1921static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1922 fmode_t fmode)
1923{
1924 spin_lock(&state->owner->so_lock);
1925 if (!(fmode & FMODE_READ))
1926 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1927 if (!(fmode & FMODE_WRITE))
1928 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1929 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1930 spin_unlock(&state->owner->so_lock);
1931}
1932
963d8fe5 1933static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1934{
963d8fe5 1935 struct nfs4_closedata *calldata = data;
1da177e4 1936 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1937 struct nfs_server *server = NFS_SERVER(calldata->inode);
1938
14516c3a
TM		 1939 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1940 return;
1da177e4
LT		 1941 /* hmm. we are done with the inode, and in the process of freeing
1942 * the state_owner. we keep this around to process errors
1943 */
1da177e4
LT		 1944 switch (task->tk_status) {
1945 case 0:
f7e8917a
FI		 1946 if (calldata->roc)
1947 pnfs_roc_set_barrier(state->inode,
1948 calldata->roc_barrier);
45328c35 1949 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1950 renew_lease(server, calldata->timestamp);
88069f77
TM		 1951 nfs4_close_clear_stateid_flags(state,
1952 calldata->arg.fmode);
1da177e4
LT		 1953 break;
1954 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1955 case -NFS4ERR_OLD_STATEID:
1956 case -NFS4ERR_BAD_STATEID:
1da177e4 1957 case -NFS4ERR_EXPIRED:
dc0b027d 1958 if (calldata->arg.fmode == 0)
9e33bed5 1959 break;
1da177e4 1960 default:
72211dbe
TM		 1961 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1962 rpc_restart_call_prepare(task);
1da177e4 1963 }
72211dbe 1964 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1965 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1966}
1967
4ce70ada 1968static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1969{
4ce70ada 1970 struct nfs4_closedata *calldata = data;
9512135d 1971 struct nfs4_state *state = calldata->state;
88069f77 1972 int call_close = 0;
9512135d 1973
963d8fe5 1974 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1975 return;
003707c7 1976
88069f77
TM		 1977 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1978 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1979 spin_lock(&state->owner->so_lock);
003707c7 1980 /* Calculate the change in open mode */
e7616923 1981 if (state->n_rdwr == 0) {
003707c7 1982 if (state->n_rdonly == 0) {
88069f77
TM		 1983 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1984 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1985 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1986 }
1987 if (state->n_wronly == 0) {
88069f77
TM		 1988 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1989 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1990 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1991 }
e7616923 1992 }
4cecb76f 1993 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1994
1995 if (!call_close) {
963d8fe5
TM		 1996 /* Note: exit _without_ calling nfs4_close_done */
1997 task->tk_action = NULL;
9512135d
TM		 1998 return;
1999 }
88069f77 2000
f7e8917a 2001 if (calldata->arg.fmode == 0) {
88069f77 2002 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 2003 if (calldata->roc &&
2004 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2005 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2006 task, NULL);
2007 return;
2008 }
2009 }
88069f77 2010
516a6af6 2011 nfs_fattr_init(calldata->res.fattr);
26e976a8 2012 calldata->timestamp = jiffies;
035168ab 2013 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 2014 &calldata->arg.seq_args, &calldata->res.seq_res,
2015 1, task))
2016 return;
5138fde0 2017 rpc_call_start(task);
1da177e4
LT		 2018}
2019
963d8fe5 2020static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2021 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2022 .rpc_call_done = nfs4_close_done,
2023 .rpc_release = nfs4_free_closedata,
2024};
2025
1da177e4
LT		 2026/*
2027 * It is possible for data to be read/written from a mem-mapped file
2028 * after the sys_close call (which hits the vfs layer as a flush).
2029 * This means that we can't safely call nfsv4 close on a file until
2030 * the inode is cleared. This in turn means that we are not good
2031 * NFSv4 citizens - we do not indicate to the server to update the file's
2032 * share state even when we are done with one of the three share
2033 * stateid's in the inode.
2034 *
2035 * NOTE: Caller must be holding the sp->so_owner semaphore!
2036 */
643168c2 2037int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2038{
4a35bd41 2039 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2040 struct nfs4_closedata *calldata;
b39e625b
TM		 2041 struct nfs4_state_owner *sp = state->owner;
2042 struct rpc_task *task;
5138fde0
TM		 2043 struct rpc_message msg = {
2044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2045 .rpc_cred = state->owner->so_cred,
2046 };
c970aa85
TM		 2047 struct rpc_task_setup task_setup_data = {
2048 .rpc_client = server->client,
5138fde0 2049 .rpc_message = &msg,
c970aa85 2050 .callback_ops = &nfs4_close_ops,
101070ca 2051 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2052 .flags = RPC_TASK_ASYNC,
2053 };
9512135d 2054 int status = -ENOMEM;
1da177e4 2055
8535b2be 2056 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2057 if (calldata == NULL)
9512135d 2058 goto out;
4a35bd41 2059 calldata->inode = state->inode;
1da177e4 2060 calldata->state = state;
4a35bd41 2061 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2062 calldata->arg.stateid = &state->open_stateid;
1da177e4 2063 /* Serialization for the sequence id */
8535b2be 2064 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2065 if (calldata->arg.seqid == NULL)
2066 goto out_free_calldata;
dc0b027d 2067 calldata->arg.fmode = 0;
a65318bf 2068 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2069 calldata->res.fattr = &calldata->fattr;
c1d51931 2070 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2071 calldata->res.server = server;
f7e8917a 2072 calldata->roc = roc;
643168c2 2073 nfs_sb_active(calldata->inode->i_sb);
9512135d 2074
1174dd1f
TM		 2075 msg.rpc_argp = &calldata->arg;
2076 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2077 task_setup_data.callback_data = calldata;
2078 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2079 if (IS_ERR(task))
2080 return PTR_ERR(task);
a49c3c77
TM		 2081 status = 0;
2082 if (wait)
2083 status = rpc_wait_for_completion_task(task);
b39e625b 2084 rpc_put_task(task);
a49c3c77 2085 return status;
9512135d
TM		 2086out_free_calldata:
2087 kfree(calldata);
2088out:
f7e8917a
FI		 2089 if (roc)
2090 pnfs_roc_release(state->inode);
b39e625b
TM		 2091 nfs4_put_open_state(state);
2092 nfs4_put_state_owner(sp);
9512135d 2093 return status;
1da177e4
LT		 2094}
2095
2b484297 2096static struct inode *
cd9a1c0e 2097nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2098{
1da177e4 2099 struct nfs4_state *state;
1da177e4 2100
565277f6 2101 /* Protect against concurrent sillydeletes */
3d4ff43d 2102 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2103 if (IS_ERR(state))
2104 return ERR_CAST(state);
cd9a1c0e 2105 ctx->state = state;
f46e0bd3 2106 return igrab(state->inode);
1da177e4
LT		 2107}
2108
1185a552 2109static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2110{
2111 if (ctx->state == NULL)
2112 return;
2113 if (is_sync)
643168c2 2114 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2115 else
643168c2 2116 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2117}
1da177e4
LT		 2118
2119static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2120{
43652ad5
BH		 2121 struct nfs4_server_caps_arg args = {
2122 .fhandle = fhandle,
2123 };
1da177e4
LT		 2124 struct nfs4_server_caps_res res = {};
2125 struct rpc_message msg = {
2126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2127 .rpc_argp = &args,
1da177e4
LT		 2128 .rpc_resp = &res,
2129 };
2130 int status;
2131
7c513058 2132 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2133 if (status == 0) {
2134 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2135 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2136 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2137 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2138 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2139 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2140 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2141 server->caps |= NFS_CAP_ACLS;
2142 if (res.has_links != 0)
2143 server->caps |= NFS_CAP_HARDLINKS;
2144 if (res.has_symlinks != 0)
2145 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2146 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2147 server->caps |= NFS_CAP_FILEID;
2148 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2149 server->caps |= NFS_CAP_MODE;
2150 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2151 server->caps |= NFS_CAP_NLINK;
2152 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2153 server->caps |= NFS_CAP_OWNER;
2154 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2155 server->caps |= NFS_CAP_OWNER_GROUP;
2156 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2157 server->caps |= NFS_CAP_ATIME;
2158 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2159 server->caps |= NFS_CAP_CTIME;
2160 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2161 server->caps |= NFS_CAP_MTIME;
2162
a65318bf
TM		 2163 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2164 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2165 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2166 server->acl_bitmask = res.acl_bitmask;
2167 }
cccef3b9 2168
1da177e4
LT		 2169 return status;
2170}
2171
55a97593 2172int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2173{
2174 struct nfs4_exception exception = { };
2175 int err;
2176 do {
2177 err = nfs4_handle_exception(server,
2178 _nfs4_server_capabilities(server, fhandle),
2179 &exception);
2180 } while (exception.retry);
2181 return err;
2182}
2183
2184static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2185 struct nfs_fsinfo *info)
2186{
1da177e4
LT		 2187 struct nfs4_lookup_root_arg args = {
2188 .bitmask = nfs4_fattr_bitmap,
2189 };
2190 struct nfs4_lookup_res res = {
2191 .server = server,
0e574af1 2192 .fattr = info->fattr,
1da177e4
LT		 2193 .fh = fhandle,
2194 };
2195 struct rpc_message msg = {
2196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2197 .rpc_argp = &args,
2198 .rpc_resp = &res,
2199 };
008f55d0 2200
0e574af1 2201 nfs_fattr_init(info->fattr);
7c513058 2202 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2203}
2204
2205static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2206 struct nfs_fsinfo *info)
2207{
2208 struct nfs4_exception exception = { };
2209 int err;
2210 do {
fb8a5ba8
BS		 2211 err = _nfs4_lookup_root(server, fhandle, info);
2212 switch (err) {
2213 case 0:
2214 case -NFS4ERR_WRONGSEC:
2215 break;
2216 default:
2217 err = nfs4_handle_exception(server, err, &exception);
2218 }
1da177e4
LT		 2219 } while (exception.retry);
2220 return err;
2221}
2222
8f70e95f
BS		 2223static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2224 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2225{
2226 struct rpc_auth *auth;
2227 int ret;
2228
2229 auth = rpcauth_create(flavor, server->client);
2230 if (!auth) {
2231 ret = -EIO;
2232 goto out;
2233 }
2234 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2235out:
2236 return ret;
2237}
2238
801a16dc 2239static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2240 struct nfs_fsinfo *info)
1da177e4 2241{
8f70e95f 2242 int i, len, status = 0;
0fabee24 2243 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2244
801a16dc
BS		 2245 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2246 flav_array[len] = RPC_AUTH_NULL;
2247 len += 1;
8f70e95f
BS		 2248
2249 for (i = 0; i < len; i++) {
2250 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2251 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2252 continue;
2253 break;
8f70e95f 2254 }
fb8a5ba8
BS		 2255 /*
2256 * -EACCESS could mean that the user doesn't have correct permissions
2257 * to access the mount. It could also mean that we tried to mount
2258 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2259 * existing mount programs don't handle -EACCES very well so it should
2260 * be mapped to -EPERM instead.
2261 */
2262 if (status == -EACCES)
2263 status = -EPERM;
801a16dc
BS		 2264 return status;
2265}
2266
2267/*
2268 * get the file handle for the "/" directory on the server
2269 */
2270static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2271 struct nfs_fsinfo *info)
2272{
fca78d6d 2273 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2274 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2275 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2276 /*
2277 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2278 * by nfs4_map_errors() as this function exits.
2279 */
fca78d6d 2280 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2281 if (status == 0)
2282 status = nfs4_server_capabilities(server, fhandle);
2283 if (status == 0)
2284 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2285 return nfs4_map_errors(status);
1da177e4
LT		 2286}
2287
533eb461 2288static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
6b97fd3d
MN		 2289/*
2290 * Get locations and (maybe) other attributes of a referral.
2291 * Note that we'll actually follow the referral later when
2292 * we detect fsid mismatch in inode revalidation
2293 */
533eb461
AA		 2294static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2295 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2296{
2297 int status = -ENOMEM;
2298 struct page *page = NULL;
2299 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2300
2301 page = alloc_page(GFP_KERNEL);
2302 if (page == NULL)
2303 goto out;
2304 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2305 if (locations == NULL)
2306 goto out;
2307
c228fd3a 2308 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2309 if (status != 0)
2310 goto out;
2311 /* Make sure server returned a different fsid for the referral */
2312 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2313 dprintk("%s: server did not return a different fsid for"
2314 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2315 status = -EIO;
2316 goto out;
2317 }
533eb461
AA		 2318 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2319 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2320
533eb461 2321 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2322 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2323 memset(fhandle, 0, sizeof(struct nfs_fh));
2324out:
2325 if (page)
2326 __free_page(page);
5d7ca35a 2327 kfree(locations);
6b97fd3d
MN		 2328 return status;
2329}
2330
1da177e4
LT		 2331static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2332{
2333 struct nfs4_getattr_arg args = {
2334 .fh = fhandle,
2335 .bitmask = server->attr_bitmask,
2336 };
2337 struct nfs4_getattr_res res = {
2338 .fattr = fattr,
2339 .server = server,
2340 };
2341 struct rpc_message msg = {
2342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2343 .rpc_argp = &args,
2344 .rpc_resp = &res,
2345 };
2346
0e574af1 2347 nfs_fattr_init(fattr);
7c513058 2348 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2349}
2350
2351static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2352{
2353 struct nfs4_exception exception = { };
2354 int err;
2355 do {
2356 err = nfs4_handle_exception(server,
2357 _nfs4_proc_getattr(server, fhandle, fattr),
2358 &exception);
2359 } while (exception.retry);
2360 return err;
2361}
2362
2363/*
2364 * The file is not closed if it is opened due to the a request to change
2365 * the size of the file. The open call will not be needed once the
2366 * VFS layer lookup-intents are implemented.
2367 *
2368 * Close is called when the inode is destroyed.
2369 * If we haven't opened the file for O_WRONLY, we
2370 * need to in the size_change case to obtain a stateid.
2371 *
2372 * Got race?
2373 * Because OPEN is always done by name in nfsv4, it is
2374 * possible that we opened a different file by the same
2375 * name. We can recognize this race condition, but we
2376 * can't do anything about it besides returning an error.
2377 *
2378 * This will be fixed with VFS changes (lookup-intent).
2379 */
2380static int
2381nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2382 struct iattr *sattr)
2383{
08e9eac4 2384 struct inode *inode = dentry->d_inode;
659bfcd6 2385 struct rpc_cred *cred = NULL;
d530838b 2386 struct nfs4_state *state = NULL;
1da177e4
LT		 2387 int status;
2388
8a1636c4
BH		 2389 if (pnfs_ld_layoutret_on_setattr(inode))
2390 pnfs_return_layout(inode);
2391
0e574af1 2392 nfs_fattr_init(fattr);
1da177e4 2393
d530838b 2394 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2395 if (sattr->ia_valid & ATTR_FILE) {
2396 struct nfs_open_context *ctx;
2397
2398 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2399 if (ctx) {
2400 cred = ctx->cred;
2401 state = ctx->state;
2402 }
659bfcd6 2403 }
08e9eac4 2404
659bfcd6 2405 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2406 if (status == 0)
2407 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2408 return status;
2409}
2410
7c513058
BS		 2411static int _nfs4_proc_lookupfh(struct rpc_clnt *clnt, struct nfs_server *server,
2412 const struct nfs_fh *dirfh, const struct qstr *name,
2413 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2b3de441
DH		 2414{
2415 int status;
2416 struct nfs4_lookup_arg args = {
2417 .bitmask = server->attr_bitmask,
2418 .dir_fh = dirfh,
2419 .name = name,
2420 };
2421 struct nfs4_lookup_res res = {
2422 .server = server,
2423 .fattr = fattr,
2424 .fh = fhandle,
2425 };
2426 struct rpc_message msg = {
2427 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2428 .rpc_argp = &args,
2429 .rpc_resp = &res,
2430 };
2431
2432 nfs_fattr_init(fattr);
2433
2434 dprintk("NFS call lookupfh %s\n", name->name);
7c513058 2435 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2b3de441 2436 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2437 return status;
2438}
2439
2440static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2441 struct qstr *name, struct nfs_fh *fhandle,
2442 struct nfs_fattr *fattr)
2443{
2444 struct nfs4_exception exception = { };
2445 int err;
2446 do {
7c513058 2447 err = _nfs4_proc_lookupfh(server->client, server, dirfh, name, fhandle, fattr);
4e56e082
TM		 2448 /* FIXME: !!!! */
2449 if (err == -NFS4ERR_MOVED) {
2450 err = -EREMOTE;
2451 break;
2452 }
2453 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2454 } while (exception.retry);
2455 return err;
2456}
2457
7c513058
BS		 2458static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2459 const struct qstr *name, struct nfs_fh *fhandle,
2460 struct nfs_fattr *fattr)
1da177e4 2461{
4e56e082 2462 int status;
1da177e4
LT		 2463
2464 dprintk("NFS call lookup %s\n", name->name);
7c513058 2465 status = _nfs4_proc_lookupfh(clnt, NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2466 if (status == -NFS4ERR_MOVED)
2467 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2468 dprintk("NFS reply lookup: %d\n", status);
2469 return status;
2470}
2471
7ebb9315
BS		 2472void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2473{
2474 memset(fh, 0, sizeof(struct nfs_fh));
2475 fattr->fsid.major = 1;
2476 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2477 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2478 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2479 fattr->nlink = 2;
2480}
2481
7c513058
BS		 2482static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2483 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1da177e4
LT		 2484{
2485 struct nfs4_exception exception = { };
2486 int err;
2487 do {
2488 err = nfs4_handle_exception(NFS_SERVER(dir),
7c513058 2489 _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr),
1da177e4 2490 &exception);
7ebb9315
BS		 2491 if (err == -EPERM)
2492 nfs_fixup_secinfo_attributes(fattr, fhandle);
1da177e4
LT		 2493 } while (exception.retry);
2494 return err;
2495}
2496
2497static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2498{
76b32999 2499 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2500 struct nfs4_accessargs args = {
2501 .fh = NFS_FH(inode),
76b32999
TM		 2502 .bitmask = server->attr_bitmask,
2503 };
2504 struct nfs4_accessres res = {
2505 .server = server,
1da177e4 2506 };
1da177e4
LT		 2507 struct rpc_message msg = {
2508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2509 .rpc_argp = &args,
2510 .rpc_resp = &res,
2511 .rpc_cred = entry->cred,
2512 };
2513 int mode = entry->mask;
2514 int status;
2515
2516 /*
2517 * Determine which access bits we want to ask for...
2518 */
2519 if (mode & MAY_READ)
2520 args.access |= NFS4_ACCESS_READ;
2521 if (S_ISDIR(inode->i_mode)) {
2522 if (mode & MAY_WRITE)
2523 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2524 if (mode & MAY_EXEC)
2525 args.access |= NFS4_ACCESS_LOOKUP;
2526 } else {
2527 if (mode & MAY_WRITE)
2528 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2529 if (mode & MAY_EXEC)
2530 args.access |= NFS4_ACCESS_EXECUTE;
2531 }
c407d41a
TM		 2532
2533 res.fattr = nfs_alloc_fattr();
2534 if (res.fattr == NULL)
2535 return -ENOMEM;
2536
7c513058 2537 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2538 if (!status) {
2539 entry->mask = 0;
2540 if (res.access & NFS4_ACCESS_READ)
2541 entry->mask |= MAY_READ;
2542 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2543 entry->mask |= MAY_WRITE;
2544 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2545 entry->mask |= MAY_EXEC;
c407d41a 2546 nfs_refresh_inode(inode, res.fattr);
1da177e4 2547 }
c407d41a 2548 nfs_free_fattr(res.fattr);
1da177e4
LT		 2549 return status;
2550}
2551
2552static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2553{
2554 struct nfs4_exception exception = { };
2555 int err;
2556 do {
2557 err = nfs4_handle_exception(NFS_SERVER(inode),
2558 _nfs4_proc_access(inode, entry),
2559 &exception);
2560 } while (exception.retry);
2561 return err;
2562}
2563
2564/*
2565 * TODO: For the time being, we don't try to get any attributes
2566 * along with any of the zero-copy operations READ, READDIR,
2567 * READLINK, WRITE.
2568 *
2569 * In the case of the first three, we want to put the GETATTR
2570 * after the read-type operation -- this is because it is hard
2571 * to predict the length of a GETATTR response in v4, and thus
2572 * align the READ data correctly. This means that the GETATTR
2573 * may end up partially falling into the page cache, and we should
2574 * shift it into the 'tail' of the xdr_buf before processing.
2575 * To do this efficiently, we need to know the total length
2576 * of data received, which doesn't seem to be available outside
2577 * of the RPC layer.
2578 *
2579 * In the case of WRITE, we also want to put the GETATTR after
2580 * the operation -- in this case because we want to make sure
2581 * we get the post-operation mtime and size. This means that
2582 * we can't use xdr_encode_pages() as written: we need a variant
2583 * of it which would leave room in the 'tail' iovec.
2584 *
2585 * Both of these changes to the XDR layer would in fact be quite
2586 * minor, but I decided to leave them for a subsequent patch.
2587 */
2588static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2589 unsigned int pgbase, unsigned int pglen)
2590{
2591 struct nfs4_readlink args = {
2592 .fh = NFS_FH(inode),
2593 .pgbase = pgbase,
2594 .pglen = pglen,
2595 .pages = &page,
2596 };
f50c7000 2597 struct nfs4_readlink_res res;
1da177e4
LT		 2598 struct rpc_message msg = {
2599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2600 .rpc_argp = &args,
f50c7000 2601 .rpc_resp = &res,
1da177e4
LT		 2602 };
2603
7c513058 2604 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2605}
2606
2607static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2608 unsigned int pgbase, unsigned int pglen)
2609{
2610 struct nfs4_exception exception = { };
2611 int err;
2612 do {
2613 err = nfs4_handle_exception(NFS_SERVER(inode),
2614 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2615 &exception);
2616 } while (exception.retry);
2617 return err;
2618}
2619
1da177e4
LT		 2620/*
2621 * Got race?
2622 * We will need to arrange for the VFS layer to provide an atomic open.
2623 * Until then, this create/open method is prone to inefficiency and race
2624 * conditions due to the lookup, create, and open VFS calls from sys_open()
2625 * placed on the wire.
2626 *
2627 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2628 * The file will be opened again in the subsequent VFS open call
2629 * (nfs4_proc_file_open).
2630 *
2631 * The open for read will just hang around to be used by any process that
2632 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2633 */
2634
2635static int
2636nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2637 int flags, struct nfs_open_context *ctx)
1da177e4 2638{
82a2c1b7 2639 struct dentry *de = dentry;
1da177e4 2640 struct nfs4_state *state;
c0204fd2
TM		 2641 struct rpc_cred *cred = NULL;
2642 fmode_t fmode = 0;
1da177e4
LT		 2643 int status = 0;
2644
c0204fd2
TM		 2645 if (ctx != NULL) {
2646 cred = ctx->cred;
3d4ff43d 2647 de = ctx->dentry;
c0204fd2 2648 fmode = ctx->mode;
1da177e4 2649 }
a8a5da99 2650 sattr->ia_mode &= ~current_umask();
82a2c1b7 2651 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
d4d9cdcb 2652 d_drop(dentry);
1da177e4
LT		 2653 if (IS_ERR(state)) {
2654 status = PTR_ERR(state);
c0204fd2 2655 goto out;
1da177e4 2656 }
d4d9cdcb 2657 d_add(dentry, igrab(state->inode));
d75340cc 2658 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2659 if (ctx != NULL)
2660 ctx->state = state;
02a913a7 2661 else
643168c2 2662 nfs4_close_sync(state, fmode);
1da177e4
LT		 2663out:
2664 return status;
2665}
2666
2667static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2668{
16e42959 2669 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2670 struct nfs_removeargs args = {
1da177e4 2671 .fh = NFS_FH(dir),
4fdc17b2
TM		 2672 .name.len = name->len,
2673 .name.name = name->name,
16e42959
TM		 2674 .bitmask = server->attr_bitmask,
2675 };
4fdc17b2 2676 struct nfs_removeres res = {
16e42959 2677 .server = server,
1da177e4 2678 };
1da177e4 2679 struct rpc_message msg = {
4fdc17b2
TM		 2680 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2681 .rpc_argp = &args,
2682 .rpc_resp = &res,
1da177e4 2683 };
d346890b
TM		 2684 int status = -ENOMEM;
2685
2686 res.dir_attr = nfs_alloc_fattr();
2687 if (res.dir_attr == NULL)
2688 goto out;
1da177e4 2689
7c513058 2690 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
16e42959
TM		 2691 if (status == 0) {
2692 update_changeattr(dir, &res.cinfo);
d346890b 2693 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2694 }
d346890b
TM		 2695 nfs_free_fattr(res.dir_attr);
2696out:
1da177e4
LT		 2697 return status;
2698}
2699
2700static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2701{
2702 struct nfs4_exception exception = { };
2703 int err;
2704 do {
2705 err = nfs4_handle_exception(NFS_SERVER(dir),
2706 _nfs4_proc_remove(dir, name),
2707 &exception);
2708 } while (exception.retry);
2709 return err;
2710}
2711
e4eff1a6 2712static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2713{
e4eff1a6
TM		 2714 struct nfs_server *server = NFS_SERVER(dir);
2715 struct nfs_removeargs *args = msg->rpc_argp;
2716 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2717
a65318bf 2718 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2719 res->server = server;
dfb4f309 2720 res->seq_res.sr_slot = NULL;
1da177e4 2721 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2722}
2723
e4eff1a6 2724static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2725{
e4eff1a6
TM		 2726 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2727
14516c3a
TM		 2728 if (!nfs4_sequence_done(task, &res->seq_res))
2729 return 0;
9e33bed5 2730 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2731 return 0;
2732 update_changeattr(dir, &res->cinfo);
d346890b 2733 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2734 return 1;
1da177e4
LT		 2735}
2736
d3d4152a
JL		 2737static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2738{
2739 struct nfs_server *server = NFS_SERVER(dir);
2740 struct nfs_renameargs *arg = msg->rpc_argp;
2741 struct nfs_renameres *res = msg->rpc_resp;
2742
2743 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2744 arg->bitmask = server->attr_bitmask;
2745 res->server = server;
2746}
2747
2748static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2749 struct inode *new_dir)
2750{
2751 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2752
2753 if (!nfs4_sequence_done(task, &res->seq_res))
2754 return 0;
2755 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2756 return 0;
2757
2758 update_changeattr(old_dir, &res->old_cinfo);
2759 nfs_post_op_update_inode(old_dir, res->old_fattr);
2760 update_changeattr(new_dir, &res->new_cinfo);
2761 nfs_post_op_update_inode(new_dir, res->new_fattr);
2762 return 1;
2763}
2764
1da177e4
LT		 2765static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2766 struct inode *new_dir, struct qstr *new_name)
2767{
6caf2c82 2768 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2769 struct nfs_renameargs arg = {
1da177e4
LT		 2770 .old_dir = NFS_FH(old_dir),
2771 .new_dir = NFS_FH(new_dir),
2772 .old_name = old_name,
2773 .new_name = new_name,
6caf2c82
TM		 2774 .bitmask = server->attr_bitmask,
2775 };
e8582a8b 2776 struct nfs_renameres res = {
6caf2c82 2777 .server = server,
1da177e4 2778 };
1da177e4
LT		 2779 struct rpc_message msg = {
2780 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2781 .rpc_argp = &arg,
2782 .rpc_resp = &res,
2783 };
011fff72 2784 int status = -ENOMEM;
1da177e4 2785
011fff72
TM		 2786 res.old_fattr = nfs_alloc_fattr();
2787 res.new_fattr = nfs_alloc_fattr();
2788 if (res.old_fattr == NULL || res.new_fattr == NULL)
2789 goto out;
1da177e4 2790
7c513058 2791 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2792 if (!status) {
2793 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2794 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2795 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2796 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2797 }
011fff72
TM		 2798out:
2799 nfs_free_fattr(res.new_fattr);
2800 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2801 return status;
2802}
2803
2804static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2805 struct inode *new_dir, struct qstr *new_name)
2806{
2807 struct nfs4_exception exception = { };
2808 int err;
2809 do {
2810 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2811 _nfs4_proc_rename(old_dir, old_name,
2812 new_dir, new_name),
2813 &exception);
2814 } while (exception.retry);
2815 return err;
2816}
2817
2818static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2819{
91ba2eee 2820 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2821 struct nfs4_link_arg arg = {
2822 .fh = NFS_FH(inode),
2823 .dir_fh = NFS_FH(dir),
2824 .name = name,
91ba2eee
TM		 2825 .bitmask = server->attr_bitmask,
2826 };
91ba2eee
TM		 2827 struct nfs4_link_res res = {
2828 .server = server,
1da177e4 2829 };
1da177e4
LT		 2830 struct rpc_message msg = {
2831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2832 .rpc_argp = &arg,
91ba2eee 2833 .rpc_resp = &res,
1da177e4 2834 };
136f2627
TM		 2835 int status = -ENOMEM;
2836
2837 res.fattr = nfs_alloc_fattr();
2838 res.dir_attr = nfs_alloc_fattr();
2839 if (res.fattr == NULL || res.dir_attr == NULL)
2840 goto out;
1da177e4 2841
7c513058 2842 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 2843 if (!status) {
2844 update_changeattr(dir, &res.cinfo);
2845 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2846 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2847 }
136f2627
TM		 2848out:
2849 nfs_free_fattr(res.dir_attr);
2850 nfs_free_fattr(res.fattr);
1da177e4
LT		 2851 return status;
2852}
2853
2854static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2855{
2856 struct nfs4_exception exception = { };
2857 int err;
2858 do {
2859 err = nfs4_handle_exception(NFS_SERVER(inode),
2860 _nfs4_proc_link(inode, dir, name),
2861 &exception);
2862 } while (exception.retry);
2863 return err;
2864}
2865
57dc9a57
TM		 2866struct nfs4_createdata {
2867 struct rpc_message msg;
2868 struct nfs4_create_arg arg;
2869 struct nfs4_create_res res;
2870 struct nfs_fh fh;
2871 struct nfs_fattr fattr;
2872 struct nfs_fattr dir_fattr;
2873};
2874
2875static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2876 struct qstr *name, struct iattr *sattr, u32 ftype)
2877{
2878 struct nfs4_createdata *data;
2879
2880 data = kzalloc(sizeof(*data), GFP_KERNEL);
2881 if (data != NULL) {
2882 struct nfs_server *server = NFS_SERVER(dir);
2883
2884 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2885 data->msg.rpc_argp = &data->arg;
2886 data->msg.rpc_resp = &data->res;
2887 data->arg.dir_fh = NFS_FH(dir);
2888 data->arg.server = server;
2889 data->arg.name = name;
2890 data->arg.attrs = sattr;
2891 data->arg.ftype = ftype;
2892 data->arg.bitmask = server->attr_bitmask;
2893 data->res.server = server;
2894 data->res.fh = &data->fh;
2895 data->res.fattr = &data->fattr;
2896 data->res.dir_fattr = &data->dir_fattr;
2897 nfs_fattr_init(data->res.fattr);
2898 nfs_fattr_init(data->res.dir_fattr);
2899 }
2900 return data;
2901}
2902
2903static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2904{
7c513058 2905 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 2906 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 2907 if (status == 0) {
2908 update_changeattr(dir, &data->res.dir_cinfo);
2909 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2910 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2911 }
2912 return status;
2913}
2914
2915static void nfs4_free_createdata(struct nfs4_createdata *data)
2916{
2917 kfree(data);
2918}
2919
4f390c15 2920static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2921 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2922{
57dc9a57
TM		 2923 struct nfs4_createdata *data;
2924 int status = -ENAMETOOLONG;
1da177e4 2925
94a6d753 2926 if (len > NFS4_MAXPATHLEN)
57dc9a57 2927 goto out;
4f390c15 2928
57dc9a57
TM		 2929 status = -ENOMEM;
2930 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2931 if (data == NULL)
2932 goto out;
2933
2934 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2935 data->arg.u.symlink.pages = &page;
2936 data->arg.u.symlink.len = len;
1da177e4 2937
57dc9a57
TM		 2938 status = nfs4_do_create(dir, dentry, data);
2939
2940 nfs4_free_createdata(data);
2941out:
1da177e4
LT		 2942 return status;
2943}
2944
4f390c15 2945static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2946 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2947{
2948 struct nfs4_exception exception = { };
2949 int err;
2950 do {
2951 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2952 _nfs4_proc_symlink(dir, dentry, page,
2953 len, sattr),
1da177e4
LT		 2954 &exception);
2955 } while (exception.retry);
2956 return err;
2957}
2958
2959static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2960 struct iattr *sattr)
2961{
57dc9a57
TM		 2962 struct nfs4_createdata *data;
2963 int status = -ENOMEM;
1da177e4 2964
57dc9a57
TM		 2965 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2966 if (data == NULL)
2967 goto out;
2968
2969 status = nfs4_do_create(dir, dentry, data);
2970
2971 nfs4_free_createdata(data);
2972out:
1da177e4
LT		 2973 return status;
2974}
2975
2976static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2977 struct iattr *sattr)
2978{
2979 struct nfs4_exception exception = { };
2980 int err;
a8a5da99
AK		 2981
2982 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2983 do {
2984 err = nfs4_handle_exception(NFS_SERVER(dir),
2985 _nfs4_proc_mkdir(dir, dentry, sattr),
2986 &exception);
2987 } while (exception.retry);
2988 return err;
2989}
2990
2991static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2992 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2993{
2994 struct inode *dir = dentry->d_inode;
2995 struct nfs4_readdir_arg args = {
2996 .fh = NFS_FH(dir),
56e4ebf8 2997 .pages = pages,
1da177e4
LT		 2998 .pgbase = 0,
2999 .count = count,
96d25e53 3000 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3001 .plus = plus,
1da177e4
LT		 3002 };
3003 struct nfs4_readdir_res res;
3004 struct rpc_message msg = {
3005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3006 .rpc_argp = &args,
3007 .rpc_resp = &res,
3008 .rpc_cred = cred,
3009 };
3010 int status;
3011
3110ff80 3012 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3013 dentry->d_parent->d_name.name,
3014 dentry->d_name.name,
3015 (unsigned long long)cookie);
1da177e4
LT		 3016 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3017 res.pgbase = args.pgbase;
7c513058 3018 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3019 if (status >= 0) {
1da177e4 3020 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3021 status += args.pgbase;
3022 }
c4812998
TM		 3023
3024 nfs_invalidate_atime(dir);
3025
3110ff80 3026 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3027 return status;
3028}
3029
3030static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3031 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3032{
3033 struct nfs4_exception exception = { };
3034 int err;
3035 do {
3036 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3037 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3038 pages, count, plus),
1da177e4
LT		 3039 &exception);
3040 } while (exception.retry);
3041 return err;
3042}
3043
3044static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3045 struct iattr *sattr, dev_t rdev)
3046{
57dc9a57
TM		 3047 struct nfs4_createdata *data;
3048 int mode = sattr->ia_mode;
3049 int status = -ENOMEM;
1da177e4
LT		 3050
3051 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3052 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3053
3054 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3055 if (data == NULL)
3056 goto out;
3057
1da177e4 3058 if (S_ISFIFO(mode))
57dc9a57 3059 data->arg.ftype = NF4FIFO;
1da177e4 3060 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3061 data->arg.ftype = NF4BLK;
3062 data->arg.u.device.specdata1 = MAJOR(rdev);
3063 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3064 }
3065 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3066 data->arg.ftype = NF4CHR;
3067 data->arg.u.device.specdata1 = MAJOR(rdev);
3068 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3069 }
1da177e4 3070
57dc9a57
TM		 3071 status = nfs4_do_create(dir, dentry, data);
3072
3073 nfs4_free_createdata(data);
3074out:
1da177e4
LT		 3075 return status;
3076}
3077
3078static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3079 struct iattr *sattr, dev_t rdev)
3080{
3081 struct nfs4_exception exception = { };
3082 int err;
a8a5da99
AK		 3083
3084 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3085 do {
3086 err = nfs4_handle_exception(NFS_SERVER(dir),
3087 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3088 &exception);
3089 } while (exception.retry);
3090 return err;
3091}
3092
3093static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3094 struct nfs_fsstat *fsstat)
3095{
3096 struct nfs4_statfs_arg args = {
3097 .fh = fhandle,
3098 .bitmask = server->attr_bitmask,
3099 };
24ad148a
BH		 3100 struct nfs4_statfs_res res = {
3101 .fsstat = fsstat,
3102 };
1da177e4
LT		 3103 struct rpc_message msg = {
3104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3105 .rpc_argp = &args,
24ad148a 3106 .rpc_resp = &res,
1da177e4
LT		 3107 };
3108
0e574af1 3109 nfs_fattr_init(fsstat->fattr);
7c513058 3110 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3111}
3112
3113static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3114{
3115 struct nfs4_exception exception = { };
3116 int err;
3117 do {
3118 err = nfs4_handle_exception(server,
3119 _nfs4_proc_statfs(server, fhandle, fsstat),
3120 &exception);
3121 } while (exception.retry);
3122 return err;
3123}
3124
3125static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3126 struct nfs_fsinfo *fsinfo)
3127{
3128 struct nfs4_fsinfo_arg args = {
3129 .fh = fhandle,
3130 .bitmask = server->attr_bitmask,
3131 };
3dda5e43
BH		 3132 struct nfs4_fsinfo_res res = {
3133 .fsinfo = fsinfo,
3134 };
1da177e4
LT		 3135 struct rpc_message msg = {
3136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3137 .rpc_argp = &args,
3dda5e43 3138 .rpc_resp = &res,
1da177e4
LT		 3139 };
3140
7c513058 3141 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3142}
3143
3144static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3145{
3146 struct nfs4_exception exception = { };
3147 int err;
3148
3149 do {
3150 err = nfs4_handle_exception(server,
3151 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3152 &exception);
3153 } while (exception.retry);
3154 return err;
3155}
3156
3157static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3158{
0e574af1 3159 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3160 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3161}
3162
3163static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3164 struct nfs_pathconf *pathconf)
3165{
3166 struct nfs4_pathconf_arg args = {
3167 .fh = fhandle,
3168 .bitmask = server->attr_bitmask,
3169 };
d45b2989
BH		 3170 struct nfs4_pathconf_res res = {
3171 .pathconf = pathconf,
3172 };
1da177e4
LT		 3173 struct rpc_message msg = {
3174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3175 .rpc_argp = &args,
d45b2989 3176 .rpc_resp = &res,
1da177e4
LT		 3177 };
3178
3179 /* None of the pathconf attributes are mandatory to implement */
3180 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3181 memset(pathconf, 0, sizeof(*pathconf));
3182 return 0;
3183 }
3184
0e574af1 3185 nfs_fattr_init(pathconf->fattr);
7c513058 3186 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3187}
3188
3189static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3190 struct nfs_pathconf *pathconf)
3191{
3192 struct nfs4_exception exception = { };
3193 int err;
3194
3195 do {
3196 err = nfs4_handle_exception(server,
3197 _nfs4_proc_pathconf(server, fhandle, pathconf),
3198 &exception);
3199 } while (exception.retry);
3200 return err;
3201}
3202
d20581aa
BH		 3203void __nfs4_read_done_cb(struct nfs_read_data *data)
3204{
3205 nfs_invalidate_atime(data->inode);
3206}
3207
cbdabc7f 3208static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3209{
ec06c096 3210 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3211
9e33bed5 3212 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3213 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3214 return -EAGAIN;
1da177e4 3215 }
8850df99 3216
d20581aa 3217 __nfs4_read_done_cb(data);
1da177e4 3218 if (task->tk_status > 0)
ec06c096
TM		 3219 renew_lease(server, data->timestamp);
3220 return 0;
1da177e4
LT		 3221}
3222
cbdabc7f
AA		 3223static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3224{
3225
3226 dprintk("--> %s\n", __func__);
3227
3228 if (!nfs4_sequence_done(task, &data->res.seq_res))
3229 return -EAGAIN;
3230
d20581aa
BH		 3231 return data->read_done_cb ? data->read_done_cb(task, data) :
3232 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3233}
3234
bdc7f021 3235static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3236{
1da177e4 3237 data->timestamp = jiffies;
cbdabc7f 3238 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3239 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3240}
3241
cbdabc7f
AA		 3242/* Reset the the nfs_read_data to send the read to the MDS. */
3243void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3244{
3245 dprintk("%s Reset task for i/o through\n", __func__);
3246 put_lseg(data->lseg);
3247 data->lseg = NULL;
3248 /* offsets will differ in the dense stripe case */
3249 data->args.offset = data->mds_offset;
3250 data->ds_clp = NULL;
3251 data->args.fh = NFS_FH(data->inode);
3252 data->read_done_cb = nfs4_read_done_cb;
3253 task->tk_ops = data->mds_ops;
3254 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3255}
3256EXPORT_SYMBOL_GPL(nfs4_reset_read);
3257
b029bc9b 3258static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3259{
1da177e4
LT		 3260 struct inode *inode = data->inode;
3261
9e33bed5 3262 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3263 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3264 return -EAGAIN;
1da177e4 3265 }
4f9838c7 3266 if (task->tk_status >= 0) {
1da177e4 3267 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3268 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3269 }
788e7a89 3270 return 0;
1da177e4
LT		 3271}
3272
b029bc9b
FI		 3273static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3274{
3275 if (!nfs4_sequence_done(task, &data->res.seq_res))
3276 return -EAGAIN;
d20581aa
BH		 3277 return data->write_done_cb ? data->write_done_cb(task, data) :
3278 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3279}
3280
a69aef14
FI		 3281/* Reset the the nfs_write_data to send the write to the MDS. */
3282void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3283{
3284 dprintk("%s Reset task for i/o through\n", __func__);
3285 put_lseg(data->lseg);
3286 data->lseg = NULL;
3287 data->ds_clp = NULL;
3288 data->write_done_cb = nfs4_write_done_cb;
3289 data->args.fh = NFS_FH(data->inode);
3290 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3291 data->args.offset = data->mds_offset;
3292 data->res.fattr = &data->fattr;
3293 task->tk_ops = data->mds_ops;
3294 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3295}
3296EXPORT_SYMBOL_GPL(nfs4_reset_write);
3297
bdc7f021 3298static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3299{
bdc7f021
TM		 3300 struct nfs_server *server = NFS_SERVER(data->inode);
3301
7ffd1064
FI		 3302 if (data->lseg) {
3303 data->args.bitmask = NULL;
3304 data->res.fattr = NULL;
3305 } else
3306 data->args.bitmask = server->cache_consistency_bitmask;
b029bc9b
FI		 3307 if (!data->write_done_cb)
3308 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3309 data->res.server = server;
1da177e4
LT		 3310 data->timestamp = jiffies;
3311
bdc7f021 3312 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3313}
3314
5f452431 3315static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3316{
1da177e4 3317 struct inode *inode = data->inode;
14516c3a 3318
9e33bed5 3319 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3320 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3321 return -EAGAIN;
1da177e4 3322 }
9e08a3c5 3323 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3324 return 0;
1da177e4
LT		 3325}
3326
5f452431
FI		 3327static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3328{
3329 if (!nfs4_sequence_done(task, &data->res.seq_res))
3330 return -EAGAIN;
3331 return data->write_done_cb(task, data);
3332}
3333
bdc7f021 3334static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3335{
788e7a89 3336 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce
FI		 3337
3338 if (data->lseg) {
3339 data->args.bitmask = NULL;
3340 data->res.fattr = NULL;
3341 } else
3342 data->args.bitmask = server->cache_consistency_bitmask;
5f452431
FI		 3343 if (!data->write_done_cb)
3344 data->write_done_cb = nfs4_commit_done_cb;
4f9838c7 3345 data->res.server = server;
bdc7f021 3346 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3347}
3348
9bc4e3ca
CL		 3349struct nfs4_renewdata {
3350 struct nfs_client *client;
3351 unsigned long timestamp;
3352};
3353
1da177e4
LT		 3354/*
3355 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3356 * standalone procedure for queueing an asynchronous RENEW.
3357 */
9bc4e3ca 3358static void nfs4_renew_release(void *calldata)
dc96aef9 3359{
9bc4e3ca
CL		 3360 struct nfs4_renewdata *data = calldata;
3361 struct nfs_client *clp = data->client;
dc96aef9 3362
0851de06
AB		 3363 if (atomic_read(&clp->cl_count) > 1)
3364 nfs4_schedule_state_renewal(clp);
3365 nfs_put_client(clp);
9bc4e3ca 3366 kfree(data);
dc96aef9
AB		 3367}
3368
9bc4e3ca 3369static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3370{
9bc4e3ca
CL		 3371 struct nfs4_renewdata *data = calldata;
3372 struct nfs_client *clp = data->client;
3373 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3374
3375 if (task->tk_status < 0) {
95baa25c
TM		 3376 /* Unless we're shutting down, schedule state recovery! */
3377 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
0400a6b0 3378 nfs4_schedule_lease_recovery(clp);
1da177e4
LT		 3379 return;
3380 }
452e9352 3381 do_renew_lease(clp, timestamp);
1da177e4
LT		 3382}
3383
963d8fe5
TM		 3384static const struct rpc_call_ops nfs4_renew_ops = {
3385 .rpc_call_done = nfs4_renew_done,
dc96aef9 3386 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3387};
3388
2f60ea6b 3389static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3390{
3391 struct rpc_message msg = {
3392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3393 .rpc_argp = clp,
b4454fe1 3394 .rpc_cred = cred,
1da177e4 3395 };
9bc4e3ca 3396 struct nfs4_renewdata *data;
1da177e4 3397
2f60ea6b
TM		 3398 if (renew_flags == 0)
3399 return 0;
0851de06
AB		 3400 if (!atomic_inc_not_zero(&clp->cl_count))
3401 return -EIO;
b569ad34 3402 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3403 if (data == NULL)
3404 return -ENOMEM;
3405 data->client = clp;
3406 data->timestamp = jiffies;
1da177e4 3407 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3408 &nfs4_renew_ops, data);
1da177e4
LT		 3409}
3410
8534d4ec 3411static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3412{
3413 struct rpc_message msg = {
3414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3415 .rpc_argp = clp,
b4454fe1 3416 .rpc_cred = cred,
1da177e4
LT		 3417 };
3418 unsigned long now = jiffies;
3419 int status;
3420
3421 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3422 if (status < 0)
3423 return status;
452e9352 3424 do_renew_lease(clp, now);
1da177e4
LT		 3425 return 0;
3426}
3427
aa1870af
BF		 3428static inline int nfs4_server_supports_acls(struct nfs_server *server)
3429{
3430 return (server->caps & NFS_CAP_ACLS)
3431 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3432 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3433}
3434
3435/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3436 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3437 * the stack.
3438 */
3439#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3440
3441static void buf_to_pages(const void *buf, size_t buflen,
3442 struct page **pages, unsigned int *pgbase)
3443{
3444 const void *p = buf;
3445
3446 *pgbase = offset_in_page(buf);
3447 p -= *pgbase;
3448 while (p < buf + buflen) {
3449 *(pages++) = virt_to_page(p);
3450 p += PAGE_CACHE_SIZE;
3451 }
3452}
3453
e9e3d724
NH		 3454static int buf_to_pages_noslab(const void *buf, size_t buflen,
3455 struct page **pages, unsigned int *pgbase)
3456{
3457 struct page *newpage, **spages;
3458 int rc = 0;
3459 size_t len;
3460 spages = pages;
3461
3462 do {
43b7c3f0 3463 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3464 newpage = alloc_page(GFP_KERNEL);
3465
3466 if (newpage == NULL)
3467 goto unwind;
3468 memcpy(page_address(newpage), buf, len);
3469 buf += len;
3470 buflen -= len;
3471 *pages++ = newpage;
3472 rc++;
3473 } while (buflen != 0);
3474
3475 return rc;
3476
3477unwind:
3478 for(; rc > 0; rc--)
3479 __free_page(spages[rc-1]);
3480 return -ENOMEM;
3481}
3482
e50a1c2e
BF		 3483struct nfs4_cached_acl {
3484 int cached;
3485 size_t len;
3e9d4154 3486 char data[0];
e50a1c2e
BF		 3487};
3488
3489static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3490{
3491 struct nfs_inode *nfsi = NFS_I(inode);
3492
3493 spin_lock(&inode->i_lock);
3494 kfree(nfsi->nfs4_acl);
3495 nfsi->nfs4_acl = acl;
3496 spin_unlock(&inode->i_lock);
3497}
3498
3499static void nfs4_zap_acl_attr(struct inode *inode)
3500{
3501 nfs4_set_cached_acl(inode, NULL);
3502}
3503
3504static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3505{
3506 struct nfs_inode *nfsi = NFS_I(inode);
3507 struct nfs4_cached_acl *acl;
3508 int ret = -ENOENT;
3509
3510 spin_lock(&inode->i_lock);
3511 acl = nfsi->nfs4_acl;
3512 if (acl == NULL)
3513 goto out;
3514 if (buf == NULL) /* user is just asking for length */
3515 goto out_len;
3516 if (acl->cached == 0)
3517 goto out;
3518 ret = -ERANGE; /* see getxattr(2) man page */
3519 if (acl->len > buflen)
3520 goto out;
3521 memcpy(buf, acl->data, acl->len);
3522out_len:
3523 ret = acl->len;
3524out:
3525 spin_unlock(&inode->i_lock);
3526 return ret;
3527}
3528
3529static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3530{
3531 struct nfs4_cached_acl *acl;
3532
3533 if (buf && acl_len <= PAGE_SIZE) {
3534 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3535 if (acl == NULL)
3536 goto out;
3537 acl->cached = 1;
3538 memcpy(acl->data, buf, acl_len);
3539 } else {
3540 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3541 if (acl == NULL)
3542 goto out;
3543 acl->cached = 0;
3544 }
3545 acl->len = acl_len;
3546out:
3547 nfs4_set_cached_acl(inode, acl);
3548}
3549
16b4289c 3550static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3551{
aa1870af
BF		 3552 struct page *pages[NFS4ACL_MAXPAGES];
3553 struct nfs_getaclargs args = {
3554 .fh = NFS_FH(inode),
3555 .acl_pages = pages,
3556 .acl_len = buflen,
3557 };
663c79b3
BH		 3558 struct nfs_getaclres res = {
3559 .acl_len = buflen,
3560 };
e50a1c2e 3561 void *resp_buf;
aa1870af
BF		 3562 struct rpc_message msg = {
3563 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3564 .rpc_argp = &args,
663c79b3 3565 .rpc_resp = &res,
aa1870af 3566 };
e50a1c2e 3567 struct page *localpage = NULL;
aa1870af
BF		 3568 int ret;
3569
e50a1c2e
BF		 3570 if (buflen < PAGE_SIZE) {
3571 /* As long as we're doing a round trip to the server anyway,
3572 * let's be prepared for a page of acl data. */
3573 localpage = alloc_page(GFP_KERNEL);
3574 resp_buf = page_address(localpage);
3575 if (localpage == NULL)
3576 return -ENOMEM;
3577 args.acl_pages[0] = localpage;
3578 args.acl_pgbase = 0;
663c79b3 3579 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3580 } else {
3581 resp_buf = buf;
3582 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3583 }
7c513058 3584 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3585 if (ret)
3586 goto out_free;
663c79b3
BH		 3587 if (res.acl_len > args.acl_len)
3588 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3589 else
663c79b3 3590 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3591 if (buf) {
3592 ret = -ERANGE;
663c79b3 3593 if (res.acl_len > buflen)
e50a1c2e
BF		 3594 goto out_free;
3595 if (localpage)
663c79b3 3596 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3597 }
663c79b3 3598 ret = res.acl_len;
e50a1c2e
BF		 3599out_free:
3600 if (localpage)
3601 __free_page(localpage);
aa1870af
BF		 3602 return ret;
3603}
3604
16b4289c
TM		 3605static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3606{
3607 struct nfs4_exception exception = { };
3608 ssize_t ret;
3609 do {
3610 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3611 if (ret >= 0)
3612 break;
3613 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3614 } while (exception.retry);
3615 return ret;
3616}
3617
e50a1c2e
BF		 3618static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3619{
3620 struct nfs_server *server = NFS_SERVER(inode);
3621 int ret;
3622
3623 if (!nfs4_server_supports_acls(server))
3624 return -EOPNOTSUPP;
3625 ret = nfs_revalidate_inode(server, inode);
3626 if (ret < 0)
3627 return ret;
08a22b39
AK		 3628 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3629 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3630 ret = nfs4_read_cached_acl(inode, buf, buflen);
3631 if (ret != -ENOENT)
3632 return ret;
3633 return nfs4_get_acl_uncached(inode, buf, buflen);
3634}
3635
16b4289c 3636static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3637{
3638 struct nfs_server *server = NFS_SERVER(inode);
3639 struct page *pages[NFS4ACL_MAXPAGES];
3640 struct nfs_setaclargs arg = {
3641 .fh = NFS_FH(inode),
3642 .acl_pages = pages,
3643 .acl_len = buflen,
3644 };
73c403a9 3645 struct nfs_setaclres res;
4b580ee3
BF		 3646 struct rpc_message msg = {
3647 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3648 .rpc_argp = &arg,
73c403a9 3649 .rpc_resp = &res,
4b580ee3 3650 };
e9e3d724 3651 int ret, i;
4b580ee3
BF		 3652
3653 if (!nfs4_server_supports_acls(server))
3654 return -EOPNOTSUPP;
e9e3d724
NH		 3655 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3656 if (i < 0)
3657 return i;
642ac549 3658 nfs_inode_return_delegation(inode);
7c513058 3659 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3660
3661 /*
3662 * Free each page after tx, so the only ref left is
3663 * held by the network stack
3664 */
3665 for (; i > 0; i--)
3666 put_page(pages[i-1]);
3667
08a22b39
AK		 3668 /*
3669 * Acl update can result in inode attribute update.
3670 * so mark the attribute cache invalid.
3671 */
3672 spin_lock(&inode->i_lock);
3673 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3674 spin_unlock(&inode->i_lock);
f41f7418
TM		 3675 nfs_access_zap_cache(inode);
3676 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3677 return ret;
3678}
3679
16b4289c
TM		 3680static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3681{
3682 struct nfs4_exception exception = { };
3683 int err;
3684 do {
3685 err = nfs4_handle_exception(NFS_SERVER(inode),
3686 __nfs4_proc_set_acl(inode, buf, buflen),
3687 &exception);
3688 } while (exception.retry);
3689 return err;
3690}
3691
1da177e4 3692static int
aa5190d0 3693nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3694{
aa5190d0
TM		 3695 struct nfs_client *clp = server->nfs_client;
3696
3697 if (task->tk_status >= 0)
1da177e4
LT		 3698 return 0;
3699 switch(task->tk_status) {
9e33bed5
TM		 3700 case -NFS4ERR_ADMIN_REVOKED:
3701 case -NFS4ERR_BAD_STATEID:
3702 case -NFS4ERR_OPENMODE:
3703 if (state == NULL)
3704 break;
0400a6b0
TM		 3705 nfs4_schedule_stateid_recovery(server, state);
3706 goto wait_on_recovery;
0ced63d1
TM		 3707 case -NFS4ERR_EXPIRED:
3708 if (state != NULL)
3709 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3710 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3711 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3712 nfs4_schedule_lease_recovery(clp);
3713 goto wait_on_recovery;
4745e315
AA		 3714#if defined(CONFIG_NFS_V4_1)
3715 case -NFS4ERR_BADSESSION:
3716 case -NFS4ERR_BADSLOT:
3717 case -NFS4ERR_BAD_HIGH_SLOT:
3718 case -NFS4ERR_DEADSESSION:
3719 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3720 case -NFS4ERR_SEQ_FALSE_RETRY:
3721 case -NFS4ERR_SEQ_MISORDERED:
3722 dprintk("%s ERROR %d, Reset session\n", __func__,
3723 task->tk_status);
0400a6b0 3724 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3725 task->tk_status = 0;
3726 return -EAGAIN;
3727#endif /* CONFIG_NFS_V4_1 */
1da177e4 3728 case -NFS4ERR_DELAY:
aa5190d0 3729 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3730 case -NFS4ERR_GRACE:
2c643488 3731 case -EKEYEXPIRED:
1da177e4
LT		 3732 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3733 task->tk_status = 0;
3734 return -EAGAIN;
a8a4ae3a 3735 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3736 case -NFS4ERR_OLD_STATEID:
3737 task->tk_status = 0;
3738 return -EAGAIN;
3739 }
3740 task->tk_status = nfs4_map_errors(task->tk_status);
3741 return 0;
0400a6b0 3742wait_on_recovery:
a2c0b9e2 3743 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3744 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3745 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3746 task->tk_status = 0;
3747 return -EAGAIN;
1da177e4
LT		 3748}
3749
bb8b27e5
TM		 3750int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3751 unsigned short port, struct rpc_cred *cred,
3752 struct nfs4_setclientid_res *res)
1da177e4
LT		 3753{
3754 nfs4_verifier sc_verifier;
3755 struct nfs4_setclientid setclientid = {
3756 .sc_verifier = &sc_verifier,
3757 .sc_prog = program,
f4eecd5d 3758 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3759 };
3760 struct rpc_message msg = {
3761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3762 .rpc_argp = &setclientid,
bb8b27e5 3763 .rpc_resp = res,
286d7d6a 3764 .rpc_cred = cred,
1da177e4 3765 };
bc4785cd 3766 __be32 *p;
1da177e4
LT		 3767 int loop = 0;
3768 int status;
3769
bc4785cd 3770 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3771 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3772 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3773
3774 for(;;) {
3775 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3776 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3777 clp->cl_ipaddr,
3778 rpc_peeraddr2str(clp->cl_rpcclient,
3779 RPC_DISPLAY_ADDR),
69dd716c
TM		 3780 rpc_peeraddr2str(clp->cl_rpcclient,
3781 RPC_DISPLAY_PROTO),
78ea323b 3782 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3783 clp->cl_id_uniquifier);
3784 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3785 sizeof(setclientid.sc_netid),
3786 rpc_peeraddr2str(clp->cl_rpcclient,
3787 RPC_DISPLAY_NETID));
1da177e4 3788 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3789 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3790 clp->cl_ipaddr, port >> 8, port & 255);
3791
1bd714f2 3792 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3793 if (status != -NFS4ERR_CLID_INUSE)
3794 break;
fd954ae1
TM		 3795 if (loop != 0) {
3796 ++clp->cl_id_uniquifier;
1da177e4 3797 break;
fd954ae1
TM		 3798 }
3799 ++loop;
3800 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3801 }
3802 return status;
3803}
3804
fd954ae1 3805int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 3806 struct nfs4_setclientid_res *arg,
3807 struct rpc_cred *cred)
1da177e4
LT		 3808{
3809 struct nfs_fsinfo fsinfo;
3810 struct rpc_message msg = {
3811 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3812 .rpc_argp = arg,
1da177e4 3813 .rpc_resp = &fsinfo,
286d7d6a 3814 .rpc_cred = cred,
1da177e4
LT		 3815 };
3816 unsigned long now;
3817 int status;
3818
3819 now = jiffies;
1bd714f2 3820 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3821 if (status == 0) {
3822 spin_lock(&clp->cl_lock);
3823 clp->cl_lease_time = fsinfo.lease_time * HZ;
3824 clp->cl_last_renewal = now;
3825 spin_unlock(&clp->cl_lock);
3826 }
3827 return status;
3828}
3829
fe650407
TM		 3830struct nfs4_delegreturndata {
3831 struct nfs4_delegreturnargs args;
fa178f29 3832 struct nfs4_delegreturnres res;
fe650407
TM		 3833 struct nfs_fh fh;
3834 nfs4_stateid stateid;
26e976a8 3835 unsigned long timestamp;
fa178f29 3836 struct nfs_fattr fattr;
fe650407
TM		 3837 int rpc_status;
3838};
3839
fe650407
TM		 3840static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3841{
3842 struct nfs4_delegreturndata *data = calldata;
938e1010 3843
14516c3a
TM		 3844 if (!nfs4_sequence_done(task, &data->res.seq_res))
3845 return;
938e1010 3846
79708861
RL		 3847 switch (task->tk_status) {
3848 case -NFS4ERR_STALE_STATEID:
3849 case -NFS4ERR_EXPIRED:
3850 case 0:
fa178f29 3851 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3852 break;
3853 default:
3854 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3855 -EAGAIN) {
3856 nfs_restart_rpc(task, data->res.server->nfs_client);
3857 return;
3858 }
3859 }
3860 data->rpc_status = task->tk_status;
fe650407
TM		 3861}
3862
3863static void nfs4_delegreturn_release(void *calldata)
3864{
fe650407
TM		 3865 kfree(calldata);
3866}
3867
938e1010
AA		 3868#if defined(CONFIG_NFS_V4_1)
3869static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3870{
3871 struct nfs4_delegreturndata *d_data;
3872
3873 d_data = (struct nfs4_delegreturndata *)data;
3874
035168ab 3875 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3876 &d_data->args.seq_args,
3877 &d_data->res.seq_res, 1, task))
3878 return;
3879 rpc_call_start(task);
3880}
3881#endif /* CONFIG_NFS_V4_1 */
3882
c8d149f3 3883static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3884#if defined(CONFIG_NFS_V4_1)
3885 .rpc_call_prepare = nfs4_delegreturn_prepare,
3886#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3887 .rpc_call_done = nfs4_delegreturn_done,
3888 .rpc_release = nfs4_delegreturn_release,
3889};
3890
e6f81075 3891static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3892{
3893 struct nfs4_delegreturndata *data;
fa178f29 3894 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3895 struct rpc_task *task;
5138fde0
TM		 3896 struct rpc_message msg = {
3897 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3898 .rpc_cred = cred,
3899 };
c970aa85
TM		 3900 struct rpc_task_setup task_setup_data = {
3901 .rpc_client = server->client,
5138fde0 3902 .rpc_message = &msg,
c970aa85
TM		 3903 .callback_ops = &nfs4_delegreturn_ops,
3904 .flags = RPC_TASK_ASYNC,
3905 };
e6f81075 3906 int status = 0;
fe650407 3907
8535b2be 3908 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3909 if (data == NULL)
3910 return -ENOMEM;
3911 data->args.fhandle = &data->fh;
3912 data->args.stateid = &data->stateid;
fa178f29 3913 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3914 nfs_copy_fh(&data->fh, NFS_FH(inode));
3915 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3916 data->res.fattr = &data->fattr;
3917 data->res.server = server;
5138fde0 3918 nfs_fattr_init(data->res.fattr);
26e976a8 3919 data->timestamp = jiffies;
fe650407
TM		 3920 data->rpc_status = 0;
3921
c970aa85 3922 task_setup_data.callback_data = data;
1174dd1f
TM		 3923 msg.rpc_argp = &data->args;
3924 msg.rpc_resp = &data->res;
c970aa85 3925 task = rpc_run_task(&task_setup_data);
7a1218a2 3926 if (IS_ERR(task))
fe650407 3927 return PTR_ERR(task);
e6f81075
TM		 3928 if (!issync)
3929 goto out;
fe650407 3930 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3931 if (status != 0)
3932 goto out;
3933 status = data->rpc_status;
3934 if (status != 0)
3935 goto out;
3936 nfs_refresh_inode(inode, &data->fattr);
3937out:
e6b3c4db 3938 rpc_put_task(task);
fe650407 3939 return status;
1da177e4
LT		 3940}
3941
e6f81075 3942int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3943{
3944 struct nfs_server *server = NFS_SERVER(inode);
3945 struct nfs4_exception exception = { };
3946 int err;
3947 do {
e6f81075 3948 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3949 switch (err) {
3950 case -NFS4ERR_STALE_STATEID:
3951 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3952 case 0:
3953 return 0;
3954 }
3955 err = nfs4_handle_exception(server, err, &exception);
3956 } while (exception.retry);
3957 return err;
3958}
3959
3960#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3961#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3962
3963/*
3964 * sleep, with exponential backoff, and retry the LOCK operation.
3965 */
3966static unsigned long
3967nfs4_set_lock_task_retry(unsigned long timeout)
3968{
150030b7 3969 schedule_timeout_killable(timeout);
1da177e4
LT		 3970 timeout <<= 1;
3971 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3972 return NFS4_LOCK_MAXTIMEOUT;
3973 return timeout;
3974}
3975
1da177e4
LT		 3976static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3977{
3978 struct inode *inode = state->inode;
3979 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3980 struct nfs_client *clp = server->nfs_client;
911d1aaf 3981 struct nfs_lockt_args arg = {
1da177e4 3982 .fh = NFS_FH(inode),
911d1aaf 3983 .fl = request,
1da177e4 3984 };
911d1aaf
TM		 3985 struct nfs_lockt_res res = {
3986 .denied = request,
1da177e4
LT		 3987 };
3988 struct rpc_message msg = {
3989 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3990 .rpc_argp = &arg,
3991 .rpc_resp = &res,
3992 .rpc_cred = state->owner->so_cred,
3993 };
1da177e4
LT		 3994 struct nfs4_lock_state *lsp;
3995 int status;
3996
911d1aaf 3997 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3998 status = nfs4_set_lock_state(state, request);
3999 if (status != 0)
4000 goto out;
4001 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 4002 arg.lock_owner.id = lsp->ls_id.id;
d035c36c 4003 arg.lock_owner.s_dev = server->s_dev;
7c513058 4004 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4005 switch (status) {
4006 case 0:
4007 request->fl_type = F_UNLCK;
4008 break;
4009 case -NFS4ERR_DENIED:
4010 status = 0;
1da177e4 4011 }
70cc6487 4012 request->fl_ops->fl_release_private(request);
8d0a8a9d 4013out:
1da177e4
LT		 4014 return status;
4015}
4016
4017static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4018{
4019 struct nfs4_exception exception = { };
4020 int err;
4021
4022 do {
4023 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4024 _nfs4_proc_getlk(state, cmd, request),
4025 &exception);
4026 } while (exception.retry);
4027 return err;
4028}
4029
4030static int do_vfs_lock(struct file *file, struct file_lock *fl)
4031{
4032 int res = 0;
4033 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4034 case FL_POSIX:
4035 res = posix_lock_file_wait(file, fl);
4036 break;
4037 case FL_FLOCK:
4038 res = flock_lock_file_wait(file, fl);
4039 break;
4040 default:
4041 BUG();
4042 }
1da177e4
LT		 4043 return res;
4044}
4045
faf5f49c 4046struct nfs4_unlockdata {
911d1aaf
TM		 4047 struct nfs_locku_args arg;
4048 struct nfs_locku_res res;
faf5f49c
TM		 4049 struct nfs4_lock_state *lsp;
4050 struct nfs_open_context *ctx;
911d1aaf
TM		 4051 struct file_lock fl;
4052 const struct nfs_server *server;
26e976a8 4053 unsigned long timestamp;
faf5f49c
TM		 4054};
4055
911d1aaf
TM		 4056static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4057 struct nfs_open_context *ctx,
4058 struct nfs4_lock_state *lsp,
4059 struct nfs_seqid *seqid)
4060{
4061 struct nfs4_unlockdata *p;
4062 struct inode *inode = lsp->ls_state->inode;
4063
8535b2be 4064 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4065 if (p == NULL)
4066 return NULL;
4067 p->arg.fh = NFS_FH(inode);
4068 p->arg.fl = &p->fl;
4069 p->arg.seqid = seqid;
c1d51931 4070 p->res.seqid = seqid;
911d1aaf
TM		 4071 p->arg.stateid = &lsp->ls_stateid;
4072 p->lsp = lsp;
4073 atomic_inc(&lsp->ls_count);
4074 /* Ensure we don't close file until we're done freeing locks! */
4075 p->ctx = get_nfs_open_context(ctx);
4076 memcpy(&p->fl, fl, sizeof(p->fl));
4077 p->server = NFS_SERVER(inode);
4078 return p;
4079}
4080
06f814a3 4081static void nfs4_locku_release_calldata(void *data)
faf5f49c 4082{
963d8fe5 4083 struct nfs4_unlockdata *calldata = data;
911d1aaf 4084 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4085 nfs4_put_lock_state(calldata->lsp);
4086 put_nfs_open_context(calldata->ctx);
4087 kfree(calldata);
faf5f49c
TM		 4088}
4089
963d8fe5 4090static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4091{
963d8fe5 4092 struct nfs4_unlockdata *calldata = data;
faf5f49c 4093
14516c3a
TM		 4094 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4095 return;
faf5f49c
TM		 4096 switch (task->tk_status) {
4097 case 0:
4098 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 4099 calldata->res.stateid.data,
faf5f49c 4100 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 4101 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4102 break;
9e33bed5
TM		 4103 case -NFS4ERR_BAD_STATEID:
4104 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4105 case -NFS4ERR_STALE_STATEID:
4106 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4107 break;
4108 default:
9e33bed5 4109 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 4110 nfs_restart_rpc(task,
d61e612a 4111 calldata->server->nfs_client);
faf5f49c 4112 }
faf5f49c
TM		 4113}
4114
4ce70ada 4115static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4116{
4ce70ada 4117 struct nfs4_unlockdata *calldata = data;
faf5f49c 4118
911d1aaf 4119 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4120 return;
4121 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4122 /* Note: exit _without_ running nfs4_locku_done */
4123 task->tk_action = NULL;
faf5f49c
TM		 4124 return;
4125 }
26e976a8 4126 calldata->timestamp = jiffies;
035168ab 4127 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 4128 &calldata->arg.seq_args,
4129 &calldata->res.seq_res, 1, task))
4130 return;
5138fde0 4131 rpc_call_start(task);
faf5f49c
TM		 4132}
4133
963d8fe5 4134static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4135 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4136 .rpc_call_done = nfs4_locku_done,
06f814a3 4137 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4138};
4139
a5d16a4d
TM		 4140static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4141 struct nfs_open_context *ctx,
4142 struct nfs4_lock_state *lsp,
4143 struct nfs_seqid *seqid)
4144{
4145 struct nfs4_unlockdata *data;
5138fde0
TM		 4146 struct rpc_message msg = {
4147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4148 .rpc_cred = ctx->cred,
4149 };
c970aa85
TM		 4150 struct rpc_task_setup task_setup_data = {
4151 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4152 .rpc_message = &msg,
c970aa85 4153 .callback_ops = &nfs4_locku_ops,
101070ca 4154 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4155 .flags = RPC_TASK_ASYNC,
4156 };
a5d16a4d 4157
137d6aca
FF		 4158 /* Ensure this is an unlock - when canceling a lock, the
4159 * canceled lock is passed in, and it won't be an unlock.
4160 */
4161 fl->fl_type = F_UNLCK;
4162
a5d16a4d
TM		 4163 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4164 if (data == NULL) {
4165 nfs_free_seqid(seqid);
4166 return ERR_PTR(-ENOMEM);
4167 }
4168
1174dd1f
TM		 4169 msg.rpc_argp = &data->arg;
4170 msg.rpc_resp = &data->res;
c970aa85
TM		 4171 task_setup_data.callback_data = data;
4172 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4173}
4174
faf5f49c
TM		 4175static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4176{
19e03c57 4177 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4178 struct nfs_seqid *seqid;
1da177e4 4179 struct nfs4_lock_state *lsp;
06f814a3
TM		 4180 struct rpc_task *task;
4181 int status = 0;
536ff0f8 4182 unsigned char fl_flags = request->fl_flags;
faf5f49c 4183
8d0a8a9d 4184 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4185 /* Unlock _before_ we do the RPC call */
4186 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4187 down_read(&nfsi->rwsem);
4188 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4189 up_read(&nfsi->rwsem);
9b073574 4190 goto out;
19e03c57
TM		 4191 }
4192 up_read(&nfsi->rwsem);
8d0a8a9d 4193 if (status != 0)
9b073574
TM		 4194 goto out;
4195 /* Is this a delegated lock? */
4196 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4197 goto out;
8d0a8a9d 4198 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4199 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4200 status = -ENOMEM;
911d1aaf 4201 if (seqid == NULL)
9b073574 4202 goto out;
cd3758e3 4203 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4204 status = PTR_ERR(task);
4205 if (IS_ERR(task))
9b073574 4206 goto out;
a5d16a4d 4207 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4208 rpc_put_task(task);
9b073574 4209out:
536ff0f8 4210 request->fl_flags = fl_flags;
1da177e4
LT		 4211 return status;
4212}
4213
a5d16a4d
TM		 4214struct nfs4_lockdata {
4215 struct nfs_lock_args arg;
4216 struct nfs_lock_res res;
4217 struct nfs4_lock_state *lsp;
4218 struct nfs_open_context *ctx;
4219 struct file_lock fl;
26e976a8 4220 unsigned long timestamp;
a5d16a4d
TM		 4221 int rpc_status;
4222 int cancelled;
66179efe 4223 struct nfs_server *server;
a5d16a4d
TM		 4224};
4225
4226static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4227 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4228 gfp_t gfp_mask)
1da177e4 4229{
a5d16a4d
TM		 4230 struct nfs4_lockdata *p;
4231 struct inode *inode = lsp->ls_state->inode;
1da177e4 4232 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4233
8535b2be 4234 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4235 if (p == NULL)
4236 return NULL;
4237
4238 p->arg.fh = NFS_FH(inode);
4239 p->arg.fl = &p->fl;
8535b2be 4240 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4241 if (p->arg.open_seqid == NULL)
4242 goto out_free;
8535b2be 4243 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4244 if (p->arg.lock_seqid == NULL)
2f74c0a0 4245 goto out_free_seqid;
a5d16a4d 4246 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4247 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4248 p->arg.lock_owner.id = lsp->ls_id.id;
d035c36c 4249 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4250 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4251 p->lsp = lsp;
66179efe 4252 p->server = server;
a5d16a4d
TM		 4253 atomic_inc(&lsp->ls_count);
4254 p->ctx = get_nfs_open_context(ctx);
4255 memcpy(&p->fl, fl, sizeof(p->fl));
4256 return p;
2f74c0a0
TM		 4257out_free_seqid:
4258 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4259out_free:
4260 kfree(p);
4261 return NULL;
4262}
4263
4264static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4265{
4266 struct nfs4_lockdata *data = calldata;
4267 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4268
3110ff80 4269 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4270 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4271 return;
a5d16a4d
TM		 4272 /* Do we need to do an open_to_lock_owner? */
4273 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4274 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4275 return;
a5d16a4d
TM		 4276 data->arg.open_stateid = &state->stateid;
4277 data->arg.new_lock_owner = 1;
c1d51931 4278 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4279 } else
4280 data->arg.new_lock_owner = 0;
26e976a8 4281 data->timestamp = jiffies;
035168ab
TM		 4282 if (nfs4_setup_sequence(data->server,
4283 &data->arg.seq_args,
66179efe
AA		 4284 &data->res.seq_res, 1, task))
4285 return;
5138fde0 4286 rpc_call_start(task);
3110ff80 4287 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4288}
4289
b257957e
AB		 4290static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4291{
4292 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4293 nfs4_lock_prepare(task, calldata);
4294}
4295
a5d16a4d
TM		 4296static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4297{
4298 struct nfs4_lockdata *data = calldata;
4299
3110ff80 4300 dprintk("%s: begin!\n", __func__);
a5d16a4d 4301
14516c3a
TM		 4302 if (!nfs4_sequence_done(task, &data->res.seq_res))
4303 return;
66179efe 4304
a5d16a4d 4305 data->rpc_status = task->tk_status;
a5d16a4d 4306 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4307 if (data->rpc_status == 0)
4308 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4309 else
4310 goto out;
4311 }
4312 if (data->rpc_status == 0) {
4313 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4314 sizeof(data->lsp->ls_stateid.data));
4315 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3d4ff43d 4316 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4317 }
a5d16a4d 4318out:
3110ff80 4319 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4320}
4321
4322static void nfs4_lock_release(void *calldata)
4323{
4324 struct nfs4_lockdata *data = calldata;
4325
3110ff80 4326 dprintk("%s: begin!\n", __func__);
2f74c0a0 4327 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4328 if (data->cancelled != 0) {
4329 struct rpc_task *task;
4330 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4331 data->arg.lock_seqid);
4332 if (!IS_ERR(task))
bf294b41 4333 rpc_put_task_async(task);
3110ff80 4334 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4335 } else
4336 nfs_free_seqid(data->arg.lock_seqid);
4337 nfs4_put_lock_state(data->lsp);
4338 put_nfs_open_context(data->ctx);
4339 kfree(data);
3110ff80 4340 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4341}
4342
4343static const struct rpc_call_ops nfs4_lock_ops = {
4344 .rpc_call_prepare = nfs4_lock_prepare,
4345 .rpc_call_done = nfs4_lock_done,
4346 .rpc_release = nfs4_lock_release,
4347};
4348
b257957e
AB		 4349static const struct rpc_call_ops nfs4_recover_lock_ops = {
4350 .rpc_call_prepare = nfs4_recover_lock_prepare,
4351 .rpc_call_done = nfs4_lock_done,
4352 .rpc_release = nfs4_lock_release,
4353};
4354
2bee72a6
TM		 4355static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4356{
2bee72a6
TM		 4357 switch (error) {
4358 case -NFS4ERR_ADMIN_REVOKED:
4359 case -NFS4ERR_BAD_STATEID:
ecac799a 4360 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4361 if (new_lock_owner != 0 ||
4362 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4363 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4364 break;
4365 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4366 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4367 case -NFS4ERR_EXPIRED:
4368 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4369 };
4370}
4371
afe6c27c 4372static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4373{
4374 struct nfs4_lockdata *data;
4375 struct rpc_task *task;
5138fde0
TM		 4376 struct rpc_message msg = {
4377 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4378 .rpc_cred = state->owner->so_cred,
4379 };
c970aa85
TM		 4380 struct rpc_task_setup task_setup_data = {
4381 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4382 .rpc_message = &msg,
c970aa85 4383 .callback_ops = &nfs4_lock_ops,
101070ca 4384 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4385 .flags = RPC_TASK_ASYNC,
4386 };
a5d16a4d
TM		 4387 int ret;
4388
3110ff80 4389 dprintk("%s: begin!\n", __func__);
cd3758e3 4390 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4391 fl->fl_u.nfs4_fl.owner,
4392 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4393 if (data == NULL)
4394 return -ENOMEM;
4395 if (IS_SETLKW(cmd))
4396 data->arg.block = 1;
b257957e
AB		 4397 if (recovery_type > NFS_LOCK_NEW) {
4398 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4399 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4400 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4401 }
1174dd1f
TM		 4402 msg.rpc_argp = &data->arg;
4403 msg.rpc_resp = &data->res;
c970aa85
TM		 4404 task_setup_data.callback_data = data;
4405 task = rpc_run_task(&task_setup_data);
7a1218a2 4406 if (IS_ERR(task))
a5d16a4d 4407 return PTR_ERR(task);
a5d16a4d
TM		 4408 ret = nfs4_wait_for_completion_rpc_task(task);
4409 if (ret == 0) {
4410 ret = data->rpc_status;
2bee72a6
TM		 4411 if (ret)
4412 nfs4_handle_setlk_error(data->server, data->lsp,
4413 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4414 } else
4415 data->cancelled = 1;
e6b3c4db 4416 rpc_put_task(task);
3110ff80 4417 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4418 return ret;
1da177e4
LT		 4419}
4420
4421static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4422{
202b50dc
TM		 4423 struct nfs_server *server = NFS_SERVER(state->inode);
4424 struct nfs4_exception exception = { };
4425 int err;
4426
4427 do {
42a2d13e
TM		 4428 /* Cache the lock if possible... */
4429 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4430 return 0;
afe6c27c 4431 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4432 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4433 break;
4434 nfs4_handle_exception(server, err, &exception);
4435 } while (exception.retry);
4436 return err;
1da177e4
LT		 4437}
4438
4439static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4440{
202b50dc
TM		 4441 struct nfs_server *server = NFS_SERVER(state->inode);
4442 struct nfs4_exception exception = { };
4443 int err;
4444
6bfc93ef
TM		 4445 err = nfs4_set_lock_state(state, request);
4446 if (err != 0)
4447 return err;
202b50dc 4448 do {
42a2d13e
TM		 4449 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4450 return 0;
afe6c27c 4451 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4452 switch (err) {
4453 default:
4454 goto out;
4455 case -NFS4ERR_GRACE:
4456 case -NFS4ERR_DELAY:
4457 nfs4_handle_exception(server, err, &exception);
4458 err = 0;
4459 }
202b50dc 4460 } while (exception.retry);
a9ed2e25 4461out:
202b50dc 4462 return err;
1da177e4
LT		 4463}
4464
f062eb6c
BS		 4465#if defined(CONFIG_NFS_V4_1)
4466static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4467{
4468 int status;
4469 struct nfs_server *server = NFS_SERVER(state->inode);
4470
4471 status = nfs41_test_stateid(server, state);
4472 if (status == NFS_OK)
4473 return 0;
4474 nfs41_free_stateid(server, state);
4475 return nfs4_lock_expired(state, request);
4476}
4477#endif
4478
1da177e4
LT		 4479static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4480{
19e03c57 4481 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4482 unsigned char fl_flags = request->fl_flags;
8e469ebd 4483 int status = -ENOLCK;
1da177e4 4484
8e469ebd
TM		 4485 if ((fl_flags & FL_POSIX) &&
4486 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4487 goto out;
6bfc93ef 4488 /* Is this a delegated open? */
6bfc93ef
TM		 4489 status = nfs4_set_lock_state(state, request);
4490 if (status != 0)
4491 goto out;
01c3b861
TM		 4492 request->fl_flags |= FL_ACCESS;
4493 status = do_vfs_lock(request->fl_file, request);
4494 if (status < 0)
4495 goto out;
19e03c57 4496 down_read(&nfsi->rwsem);
01c3b861 4497 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4498 /* Yes: cache locks! */
01c3b861 4499 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4500 request->fl_flags = fl_flags & ~FL_SLEEP;
4501 status = do_vfs_lock(request->fl_file, request);
4502 goto out_unlock;
01c3b861 4503 }
afe6c27c 4504 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4505 if (status != 0)
01c3b861 4506 goto out_unlock;
6bfc93ef 4507 /* Note: we always want to sleep here! */
01c3b861 4508 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4509 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4510 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4511out_unlock:
19e03c57 4512 up_read(&nfsi->rwsem);
01c3b861
TM		 4513out:
4514 request->fl_flags = fl_flags;
1da177e4
LT		 4515 return status;
4516}
4517
4518static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4519{
4520 struct nfs4_exception exception = { };
4521 int err;
4522
4523 do {
965b5d67
TM		 4524 err = _nfs4_proc_setlk(state, cmd, request);
4525 if (err == -NFS4ERR_DENIED)
4526 err = -EAGAIN;
1da177e4 4527 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4528 err, &exception);
1da177e4
LT		 4529 } while (exception.retry);
4530 return err;
4531}
4532
4533static int
4534nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4535{
4536 struct nfs_open_context *ctx;
4537 struct nfs4_state *state;
4538 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4539 int status;
4540
4541 /* verify open state */
cd3758e3 4542 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4543 state = ctx->state;
4544
4545 if (request->fl_start < 0 || request->fl_end < 0)
4546 return -EINVAL;
4547
d953126a
TM		 4548 if (IS_GETLK(cmd)) {
4549 if (state != NULL)
4550 return nfs4_proc_getlk(state, F_GETLK, request);
4551 return 0;
4552 }
1da177e4
LT		 4553
4554 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4555 return -EINVAL;
4556
d953126a
TM		 4557 if (request->fl_type == F_UNLCK) {
4558 if (state != NULL)
4559 return nfs4_proc_unlck(state, cmd, request);
4560 return 0;
4561 }
1da177e4 4562
d953126a
TM		 4563 if (state == NULL)
4564 return -ENOLCK;
1da177e4
LT		 4565 do {
4566 status = nfs4_proc_setlk(state, cmd, request);
4567 if ((status != -EAGAIN) || IS_SETLK(cmd))
4568 break;
4569 timeout = nfs4_set_lock_task_retry(timeout);
4570 status = -ERESTARTSYS;
4571 if (signalled())
4572 break;
4573 } while(status < 0);
1da177e4
LT		 4574 return status;
4575}
4576
888e694c
TM		 4577int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4578{
4579 struct nfs_server *server = NFS_SERVER(state->inode);
4580 struct nfs4_exception exception = { };
4581 int err;
4582
4583 err = nfs4_set_lock_state(state, fl);
4584 if (err != 0)
4585 goto out;
4586 do {
afe6c27c 4587 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4588 switch (err) {
4589 default:
4590 printk(KERN_ERR "%s: unhandled error %d.\n",
4591 __func__, err);
4592 case 0:
965b5d67 4593 case -ESTALE:
d5122201
TM		 4594 goto out;
4595 case -NFS4ERR_EXPIRED:
0ced63d1 4596 nfs4_schedule_stateid_recovery(server, state);
d5122201 4597 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4598 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4599 nfs4_schedule_lease_recovery(server->nfs_client);
4600 goto out;
74e7bb73
RL		 4601 case -NFS4ERR_BADSESSION:
4602 case -NFS4ERR_BADSLOT:
4603 case -NFS4ERR_BAD_HIGH_SLOT:
4604 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4605 case -NFS4ERR_DEADSESSION:
0400a6b0 4606 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4607 goto out;
965b5d67
TM		 4608 case -ERESTARTSYS:
4609 /*
4610 * The show must go on: exit, but mark the
4611 * stateid as needing recovery.
4612 */
4613 case -NFS4ERR_ADMIN_REVOKED:
4614 case -NFS4ERR_BAD_STATEID:
4615 case -NFS4ERR_OPENMODE:
0400a6b0 4616 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4617 err = 0;
4618 goto out;
168667c4
TM		 4619 case -EKEYEXPIRED:
4620 /*
4621 * User RPCSEC_GSS context has expired.
4622 * We cannot recover this stateid now, so
4623 * skip it and allow recovery thread to
4624 * proceed.
4625 */
4626 err = 0;
4627 goto out;
965b5d67
TM		 4628 case -ENOMEM:
4629 case -NFS4ERR_DENIED:
4630 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4631 err = 0;
4632 goto out;
d5122201
TM		 4633 case -NFS4ERR_DELAY:
4634 break;
4635 }
888e694c
TM		 4636 err = nfs4_handle_exception(server, err, &exception);
4637 } while (exception.retry);
4638out:
4639 return err;
4640}
6b3b5496 4641
d3c7b7cc
TM		 4642static void nfs4_release_lockowner_release(void *calldata)
4643{
4644 kfree(calldata);
4645}
4646
4647const struct rpc_call_ops nfs4_release_lockowner_ops = {
4648 .rpc_release = nfs4_release_lockowner_release,
4649};
4650
4651void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4652{
4653 struct nfs_server *server = lsp->ls_state->owner->so_server;
4654 struct nfs_release_lockowner_args *args;
4655 struct rpc_message msg = {
4656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4657 };
4658
4659 if (server->nfs_client->cl_mvops->minor_version != 0)
4660 return;
4661 args = kmalloc(sizeof(*args), GFP_NOFS);
4662 if (!args)
4663 return;
4664 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4665 args->lock_owner.id = lsp->ls_id.id;
d035c36c 4666 args->lock_owner.s_dev = server->s_dev;
d3c7b7cc
TM		 4667 msg.rpc_argp = args;
4668 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4669}
4670
aa1870af
BF		 4671#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4672
64c2ce8b
AK		 4673static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4674 const void *buf, size_t buflen,
4675 int flags, int type)
6b3b5496 4676{
64c2ce8b
AK		 4677 if (strcmp(key, "") != 0)
4678 return -EINVAL;
4b580ee3 4679
64c2ce8b 4680 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4681}
4682
64c2ce8b
AK		 4683static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4684 void *buf, size_t buflen, int type)
6b3b5496 4685{
64c2ce8b
AK		 4686 if (strcmp(key, "") != 0)
4687 return -EINVAL;
aa1870af 4688
64c2ce8b 4689 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4690}
4691
64c2ce8b
AK		 4692static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4693 size_t list_len, const char *name,
4694 size_t name_len, int type)
6b3b5496 4695{
64c2ce8b 4696 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4697
096455a2
BF		 4698 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4699 return 0;
64c2ce8b
AK		 4700
4701 if (list && len <= list_len)
4702 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4703 return len;
6b3b5496
BF		 4704}
4705
533eb461
AA		 4706/*
4707 * nfs_fhget will use either the mounted_on_fileid or the fileid
4708 */
69aaaae1
TM		 4709static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4710{
533eb461
AA		 4711 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4712 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4713 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4714 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
69aaaae1
TM		 4715 return;
4716
4717 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4718 NFS_ATTR_FATTR_NLINK;
4719 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4720 fattr->nlink = 2;
4721}
4722
56659e99 4723int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4724 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4725{
4726 struct nfs_server *server = NFS_SERVER(dir);
4727 u32 bitmask[2] = {
361e624f 4728 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 4729 };
4730 struct nfs4_fs_locations_arg args = {
4731 .dir_fh = NFS_FH(dir),
c228fd3a 4732 .name = name,
683b57b4
TM		 4733 .page = page,
4734 .bitmask = bitmask,
4735 };
22958463
BH		 4736 struct nfs4_fs_locations_res res = {
4737 .fs_locations = fs_locations,
4738 };
683b57b4
TM		 4739 struct rpc_message msg = {
4740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4741 .rpc_argp = &args,
22958463 4742 .rpc_resp = &res,
683b57b4
TM		 4743 };
4744 int status;
4745
3110ff80 4746 dprintk("%s: start\n", __func__);
533eb461
AA		 4747
4748 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4749 * is not supported */
4750 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4751 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4752 else
4753 bitmask[0] |= FATTR4_WORD0_FILEID;
4754
c228fd3a 4755 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4756 fs_locations->server = server;
830b8e33 4757 fs_locations->nlocations = 0;
7c513058 4758 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 4759 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4760 return status;
4761}
4762
5a5ea0d4
BS		 4763static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4764{
4765 int status;
4766 struct nfs4_secinfo_arg args = {
4767 .dir_fh = NFS_FH(dir),
4768 .name = name,
4769 };
4770 struct nfs4_secinfo_res res = {
4771 .flavors = flavors,
4772 };
4773 struct rpc_message msg = {
4774 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4775 .rpc_argp = &args,
4776 .rpc_resp = &res,
4777 };
4778
4779 dprintk("NFS call secinfo %s\n", name->name);
4780 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4781 dprintk("NFS reply secinfo: %d\n", status);
4782 return status;
4783}
4784
4785int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4786{
4787 struct nfs4_exception exception = { };
4788 int err;
4789 do {
4790 err = nfs4_handle_exception(NFS_SERVER(dir),
4791 _nfs4_proc_secinfo(dir, name, flavors),
4792 &exception);
4793 } while (exception.retry);
4794 return err;
4795}
4796
557134a3 4797#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4798/*
4799 * Check the exchange flags returned by the server for invalid flags, having
4800 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4801 * DS flags set.
4802 */
4803static int nfs4_check_cl_exchange_flags(u32 flags)
4804{
4805 if (flags & ~EXCHGID4_FLAG_MASK_R)
4806 goto out_inval;
4807 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4808 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4809 goto out_inval;
4810 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4811 goto out_inval;
4812 return NFS_OK;
4813out_inval:
4814 return -NFS4ERR_INVAL;
4815}
4816
78fe0f41
WAA		 4817static bool
4818nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4819{
4820 if (a->server_scope_sz == b->server_scope_sz &&
4821 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4822 return true;
4823
4824 return false;
4825}
4826
99fe60d0
BH		 4827/*
4828 * nfs4_proc_exchange_id()
4829 *
4830 * Since the clientid has expired, all compounds using sessions
4831 * associated with the stale clientid will be returning
4832 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4833 * be in some phase of session reset.
4834 */
4d643d1d 4835int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4836{
4837 nfs4_verifier verifier;
4838 struct nfs41_exchange_id_args args = {
4839 .client = clp,
357f54d6 4840 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 4841 };
4842 struct nfs41_exchange_id_res res = {
4843 .client = clp,
4844 };
4845 int status;
4846 struct rpc_message msg = {
4847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4848 .rpc_argp = &args,
4849 .rpc_resp = &res,
4850 .rpc_cred = cred,
4851 };
4852 __be32 *p;
4853
4854 dprintk("--> %s\n", __func__);
4855 BUG_ON(clp == NULL);
a7b72103 4856
99fe60d0
BH		 4857 p = (u32 *)verifier.data;
4858 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4859 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4860 args.verifier = &verifier;
4861
c7a360b0
AA		 4862 args.id_len = scnprintf(args.id, sizeof(args.id),
4863 "%s/%s.%s/%u",
4864 clp->cl_ipaddr,
4865 init_utsname()->nodename,
4866 init_utsname()->domainname,
4867 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 4868
78fe0f41
WAA		 4869 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4870 if (unlikely(!res.server_scope))
4871 return -ENOMEM;
4872
1bd714f2 4873 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c7a360b0
AA		 4874 if (!status)
4875 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
78fe0f41
WAA		 4876
4877 if (!status) {
4878 if (clp->server_scope &&
4879 !nfs41_same_server_scope(clp->server_scope,
4880 res.server_scope)) {
4881 dprintk("%s: server_scope mismatch detected\n",
4882 __func__);
4883 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4884 kfree(clp->server_scope);
4885 clp->server_scope = NULL;
4886 }
4887
4888 if (!clp->server_scope)
4889 clp->server_scope = res.server_scope;
4890 else
4891 kfree(res.server_scope);
4892 }
4893
99fe60d0
BH		 4894 dprintk("<-- %s status= %d\n", __func__, status);
4895 return status;
4896}
4897
2050f0cc
AA		 4898struct nfs4_get_lease_time_data {
4899 struct nfs4_get_lease_time_args *args;
4900 struct nfs4_get_lease_time_res *res;
4901 struct nfs_client *clp;
4902};
4903
4904static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4905 void *calldata)
4906{
4907 int ret;
4908 struct nfs4_get_lease_time_data *data =
4909 (struct nfs4_get_lease_time_data *)calldata;
4910
4911 dprintk("--> %s\n", __func__);
689cf5c1 4912 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4913 /* just setup sequence, do not trigger session recovery
4914 since we're invoked within one */
4915 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4916 &data->args->la_seq_args,
4917 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4918
4919 BUG_ON(ret == -EAGAIN);
4920 rpc_call_start(task);
4921 dprintk("<-- %s\n", __func__);
4922}
4923
4924/*
4925 * Called from nfs4_state_manager thread for session setup, so don't recover
4926 * from sequence operation or clientid errors.
4927 */
4928static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4929{
4930 struct nfs4_get_lease_time_data *data =
4931 (struct nfs4_get_lease_time_data *)calldata;
4932
4933 dprintk("--> %s\n", __func__);
14516c3a
TM		 4934 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4935 return;
2050f0cc
AA		 4936 switch (task->tk_status) {
4937 case -NFS4ERR_DELAY:
4938 case -NFS4ERR_GRACE:
4939 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4940 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4941 task->tk_status = 0;
a8a4ae3a
AA		 4942 /* fall through */
4943 case -NFS4ERR_RETRY_UNCACHED_REP:
0110ee15 4944 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4945 return;
4946 }
2050f0cc
AA		 4947 dprintk("<-- %s\n", __func__);
4948}
4949
4950struct rpc_call_ops nfs4_get_lease_time_ops = {
4951 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4952 .rpc_call_done = nfs4_get_lease_time_done,
4953};
4954
4955int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4956{
4957 struct rpc_task *task;
4958 struct nfs4_get_lease_time_args args;
4959 struct nfs4_get_lease_time_res res = {
4960 .lr_fsinfo = fsinfo,
4961 };
4962 struct nfs4_get_lease_time_data data = {
4963 .args = &args,
4964 .res = &res,
4965 .clp = clp,
4966 };
4967 struct rpc_message msg = {
4968 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4969 .rpc_argp = &args,
4970 .rpc_resp = &res,
4971 };
4972 struct rpc_task_setup task_setup = {
4973 .rpc_client = clp->cl_rpcclient,
4974 .rpc_message = &msg,
4975 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 4976 .callback_data = &data,
4977 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 4978 };
4979 int status;
4980
2050f0cc
AA		 4981 dprintk("--> %s\n", __func__);
4982 task = rpc_run_task(&task_setup);
4983
4984 if (IS_ERR(task))
4985 status = PTR_ERR(task);
4986 else {
4987 status = task->tk_status;
4988 rpc_put_task(task);
4989 }
4990 dprintk("<-- %s return %d\n", __func__, status);
4991
4992 return status;
4993}
4994
b73dafa7
RL		 4995/*
4996 * Reset a slot table
4997 */
104aeba4
AA		 4998static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4999 int ivalue)
ac72b7b3 5000{
104aeba4 5001 struct nfs4_slot *new = NULL;
b73dafa7 5002 int i;
ac72b7b3
AA		 5003 int ret = 0;
5004
104aeba4
AA		 5005 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5006 max_reqs, tbl->max_slots);
ac72b7b3 5007
104aeba4
AA		 5008 /* Does the newly negotiated max_reqs match the existing slot table? */
5009 if (max_reqs != tbl->max_slots) {
5010 ret = -ENOMEM;
5011 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 5012 GFP_NOFS);
104aeba4
AA		 5013 if (!new)
5014 goto out;
5015 ret = 0;
5016 kfree(tbl->slots);
ac72b7b3
AA		 5017 }
5018 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 5019 if (new) {
5020 tbl->slots = new;
5021 tbl->max_slots = max_reqs;
5022 }
5023 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 5024 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 5025 spin_unlock(&tbl->slot_tbl_lock);
5026 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5027 tbl, tbl->slots, tbl->max_slots);
5028out:
5029 dprintk("<-- %s: return %d\n", __func__, ret);
5030 return ret;
5031}
5032
b73dafa7
RL		 5033/*
5034 * Reset the forechannel and backchannel slot tables
5035 */
5036static int nfs4_reset_slot_tables(struct nfs4_session *session)
5037{
5038 int status;
5039
5040 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 5041 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 5042 if (status)
5043 return status;
5044
5045 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 5046 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 5047 return status;
5048}
5049
f8625a6a
RL		 5050/* Destroy the slot table */
5051static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5052{
5053 if (session->fc_slot_table.slots != NULL) {
5054 kfree(session->fc_slot_table.slots);
5055 session->fc_slot_table.slots = NULL;
5056 }
5057 if (session->bc_slot_table.slots != NULL) {
5058 kfree(session->bc_slot_table.slots);
5059 session->bc_slot_table.slots = NULL;
5060 }
5061 return;
5062}
5063
fc931582
AA		 5064/*
5065 * Initialize slot table
5066 */
050047ce
RL		 5067static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5068 int max_slots, int ivalue)
fc931582 5069{
fc931582
AA		 5070 struct nfs4_slot *slot;
5071 int ret = -ENOMEM;
5072
5073 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5074
050047ce 5075 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 5076
8535b2be 5077 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 5078 if (!slot)
5079 goto out;
fc931582
AA		 5080 ret = 0;
5081
5082 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 5083 tbl->max_slots = max_slots;
5084 tbl->slots = slot;
5085 tbl->highest_used_slotid = -1; /* no slot is currently used */
5086 spin_unlock(&tbl->slot_tbl_lock);
5087 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5088 tbl, tbl->slots, tbl->max_slots);
5089out:
5090 dprintk("<-- %s: return %d\n", __func__, ret);
5091 return ret;
fc931582
AA		 5092}
5093
050047ce
RL		 5094/*
5095 * Initialize the forechannel and backchannel tables
5096 */
5097static int nfs4_init_slot_tables(struct nfs4_session *session)
5098{
f26468fb
TM		 5099 struct nfs4_slot_table *tbl;
5100 int status = 0;
050047ce 5101
f26468fb
TM		 5102 tbl = &session->fc_slot_table;
5103 if (tbl->slots == NULL) {
5104 status = nfs4_init_slot_table(tbl,
5105 session->fc_attrs.max_reqs, 1);
5106 if (status)
5107 return status;
5108 }
050047ce 5109
f26468fb
TM		 5110 tbl = &session->bc_slot_table;
5111 if (tbl->slots == NULL) {
5112 status = nfs4_init_slot_table(tbl,
5113 session->bc_attrs.max_reqs, 0);
5114 if (status)
5115 nfs4_destroy_slot_tables(session);
5116 }
f8625a6a
RL		 5117
5118 return status;
557134a3
AA		 5119}
5120
5121struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5122{
5123 struct nfs4_session *session;
5124 struct nfs4_slot_table *tbl;
5125
8535b2be 5126 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5127 if (!session)
5128 return NULL;
76db6d95 5129
557134a3 5130 tbl = &session->fc_slot_table;
9dfdf404 5131 tbl->highest_used_slotid = -1;
557134a3 5132 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5133 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5134 init_completion(&tbl->complete);
f8625a6a
RL		 5135
5136 tbl = &session->bc_slot_table;
9dfdf404 5137 tbl->highest_used_slotid = -1;
f8625a6a
RL		 5138 spin_lock_init(&tbl->slot_tbl_lock);
5139 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5140 init_completion(&tbl->complete);
f8625a6a 5141
1055d76d
TM		 5142 session->session_state = 1<<NFS4_SESSION_INITING;
5143
557134a3
AA		 5144 session->clp = clp;
5145 return session;
5146}
5147
5148void nfs4_destroy_session(struct nfs4_session *session)
5149{
5a0ffe54
AA		 5150 nfs4_proc_destroy_session(session);
5151 dprintk("%s Destroy backchannel for xprt %p\n",
5152 __func__, session->clp->cl_rpcclient->cl_xprt);
5153 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5154 NFS41_BC_MIN_CALLBACKS);
f8625a6a 5155 nfs4_destroy_slot_tables(session);
557134a3
AA		 5156 kfree(session);
5157}
5158
fc931582
AA		 5159/*
5160 * Initialize the values to be used by the client in CREATE_SESSION
5161 * If nfs4_init_session set the fore channel request and response sizes,
5162 * use them.
5163 *
5164 * Set the back channel max_resp_sz_cached to zero to force the client to
5165 * always set csa_cachethis to FALSE because the current implementation
5166 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5167 */
5168static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5169{
5170 struct nfs4_session *session = args->client->cl_session;
5171 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5172 mxresp_sz = session->fc_attrs.max_resp_sz;
5173
5174 if (mxrqst_sz == 0)
5175 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5176 if (mxresp_sz == 0)
5177 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5178 /* Fore channel attributes */
fc931582
AA		 5179 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5180 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 5181 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5182 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5183
5184 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5185 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5186 __func__,
5187 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5188 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5189
5190 /* Back channel attributes */
fc931582
AA		 5191 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5192 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5193 args->bc_attrs.max_resp_sz_cached = 0;
5194 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5195 args->bc_attrs.max_reqs = 1;
5196
5197 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5198 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5199 __func__,
5200 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5201 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5202 args->bc_attrs.max_reqs);
5203}
5204
43c2e885 5205static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5206{
43c2e885
BF		 5207 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5208 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5209
43c2e885
BF		 5210 if (rcvd->max_resp_sz > sent->max_resp_sz)
5211 return -EINVAL;
5212 /*
5213 * Our requested max_ops is the minimum we need; we're not
5214 * prepared to break up compounds into smaller pieces than that.
5215 * So, no point even trying to continue if the server won't
5216 * cooperate:
5217 */
5218 if (rcvd->max_ops < sent->max_ops)
5219 return -EINVAL;
5220 if (rcvd->max_reqs == 0)
5221 return -EINVAL;
5222 return 0;
8d35301d
AA		 5223}
5224
43c2e885
BF		 5225static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5226{
5227 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5228 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5229
43c2e885
BF		 5230 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5231 return -EINVAL;
5232 if (rcvd->max_resp_sz < sent->max_resp_sz)
5233 return -EINVAL;
5234 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5235 return -EINVAL;
5236 /* These would render the backchannel useless: */
5237 if (rcvd->max_ops == 0)
5238 return -EINVAL;
5239 if (rcvd->max_reqs == 0)
5240 return -EINVAL;
5241 return 0;
5242}
8d35301d 5243
8d35301d
AA		 5244static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5245 struct nfs4_session *session)
5246{
43c2e885 5247 int ret;
8d35301d 5248
43c2e885
BF		 5249 ret = nfs4_verify_fore_channel_attrs(args, session);
5250 if (ret)
5251 return ret;
5252 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5253}
5254
fc931582
AA		 5255static int _nfs4_proc_create_session(struct nfs_client *clp)
5256{
5257 struct nfs4_session *session = clp->cl_session;
5258 struct nfs41_create_session_args args = {
5259 .client = clp,
5260 .cb_program = NFS4_CALLBACK,
5261 };
5262 struct nfs41_create_session_res res = {
5263 .client = clp,
5264 };
5265 struct rpc_message msg = {
5266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5267 .rpc_argp = &args,
5268 .rpc_resp = &res,
5269 };
5270 int status;
5271
5272 nfs4_init_channel_attrs(&args);
0f91421e 5273 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5274
1bd714f2 5275 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5276
8d35301d
AA		 5277 if (!status)
5278 /* Verify the session's negotiated channel_attrs values */
5279 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5280 if (!status) {
5281 /* Increment the clientid slot sequence id */
5282 clp->cl_seqid++;
5283 }
5284
5285 return status;
5286}
5287
5288/*
5289 * Issues a CREATE_SESSION operation to the server.
5290 * It is the responsibility of the caller to verify the session is
5291 * expired before calling this routine.
5292 */
f26468fb 5293int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5294{
5295 int status;
5296 unsigned *ptr;
fc931582
AA		 5297 struct nfs4_session *session = clp->cl_session;
5298
5299 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5300
fd954ae1 5301 status = _nfs4_proc_create_session(clp);
fc931582
AA		 5302 if (status)
5303 goto out;
5304
f26468fb
TM		 5305 /* Init and reset the fore channel */
5306 status = nfs4_init_slot_tables(session);
5307 dprintk("slot table initialization returned %d\n", status);
5308 if (status)
5309 goto out;
5310 status = nfs4_reset_slot_tables(session);
5311 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5312 if (status)
5313 goto out;
5314
5315 ptr = (unsigned *)&session->sess_id.data[0];
5316 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5317 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5318out:
5319 dprintk("<-- %s\n", __func__);
5320 return status;
5321}
5322
0f3e66c6
AA		 5323/*
5324 * Issue the over-the-wire RPC DESTROY_SESSION.
5325 * The caller must serialize access to this routine.
5326 */
5327int nfs4_proc_destroy_session(struct nfs4_session *session)
5328{
5329 int status = 0;
5330 struct rpc_message msg;
5331
5332 dprintk("--> nfs4_proc_destroy_session\n");
5333
5334 /* session is still being setup */
5335 if (session->clp->cl_cons_state != NFS_CS_READY)
5336 return status;
5337
5338 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5339 msg.rpc_argp = session;
5340 msg.rpc_resp = NULL;
5341 msg.rpc_cred = NULL;
1bd714f2 5342 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5343
5344 if (status)
5345 printk(KERN_WARNING
5346 "Got error %d from the server on DESTROY_SESSION. "
5347 "Session has been destroyed regardless...\n", status);
5348
5349 dprintk("<-- nfs4_proc_destroy_session\n");
5350 return status;
5351}
5352
fccba804
TM		 5353int nfs4_init_session(struct nfs_server *server)
5354{
5355 struct nfs_client *clp = server->nfs_client;
2449ea2e 5356 struct nfs4_session *session;
68bf05ef 5357 unsigned int rsize, wsize;
fccba804
TM		 5358 int ret;
5359
5360 if (!nfs4_has_session(clp))
5361 return 0;
5362
1055d76d
TM		 5363 session = clp->cl_session;
5364 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5365 return 0;
5366
68bf05ef
AA		 5367 rsize = server->rsize;
5368 if (rsize == 0)
5369 rsize = NFS_MAX_FILE_IO_SIZE;
5370 wsize = server->wsize;
5371 if (wsize == 0)
5372 wsize = NFS_MAX_FILE_IO_SIZE;
5373
68bf05ef
AA		 5374 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5375 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5376
fccba804
TM		 5377 ret = nfs4_recover_expired_lease(server);
5378 if (!ret)
5379 ret = nfs4_check_client_ready(clp);
5380 return ret;
5381}
5382
d83217c1
AA		 5383int nfs4_init_ds_session(struct nfs_client *clp)
5384{
5385 struct nfs4_session *session = clp->cl_session;
5386 int ret;
5387
5388 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5389 return 0;
5390
5391 ret = nfs4_client_recover_expired_lease(clp);
5392 if (!ret)
5393 /* Test for the DS role */
5394 if (!is_ds_client(clp))
5395 ret = -ENODEV;
5396 if (!ret)
5397 ret = nfs4_check_client_ready(clp);
5398 return ret;
5399
5400}
5401EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5402
5403
fc01cea9
AA		 5404/*
5405 * Renew the cl_session lease.
5406 */
d5f8d3fe
TM		 5407struct nfs4_sequence_data {
5408 struct nfs_client *clp;
5409 struct nfs4_sequence_args args;
5410 struct nfs4_sequence_res res;
5411};
5412
dc96aef9
AB		 5413static void nfs41_sequence_release(void *data)
5414{
d5f8d3fe
TM		 5415 struct nfs4_sequence_data *calldata = data;
5416 struct nfs_client *clp = calldata->clp;
dc96aef9 5417
7135840f
AB		 5418 if (atomic_read(&clp->cl_count) > 1)
5419 nfs4_schedule_state_renewal(clp);
5420 nfs_put_client(clp);
d5f8d3fe 5421 kfree(calldata);
dc96aef9
AB		 5422}
5423
aa5190d0
TM		 5424static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5425{
5426 switch(task->tk_status) {
5427 case -NFS4ERR_DELAY:
aa5190d0
TM		 5428 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5429 return -EAGAIN;
5430 default:
0400a6b0 5431 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5432 }
5433 return 0;
5434}
5435
dc96aef9 5436static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5437{
d5f8d3fe
TM		 5438 struct nfs4_sequence_data *calldata = data;
5439 struct nfs_client *clp = calldata->clp;
fc01cea9 5440
14516c3a
TM		 5441 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5442 return;
fc01cea9
AA		 5443
5444 if (task->tk_status < 0) {
5445 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5446 if (atomic_read(&clp->cl_count) == 1)
5447 goto out;
fc01cea9 5448
aa5190d0
TM		 5449 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5450 rpc_restart_call_prepare(task);
fc01cea9
AA		 5451 return;
5452 }
5453 }
fc01cea9 5454 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5455out:
fc01cea9
AA		 5456 dprintk("<-- %s\n", __func__);
5457}
5458
5459static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5460{
d5f8d3fe
TM		 5461 struct nfs4_sequence_data *calldata = data;
5462 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5463 struct nfs4_sequence_args *args;
5464 struct nfs4_sequence_res *res;
5465
fc01cea9
AA		 5466 args = task->tk_msg.rpc_argp;
5467 res = task->tk_msg.rpc_resp;
5468
035168ab 5469 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5470 return;
5471 rpc_call_start(task);
5472}
5473
5474static const struct rpc_call_ops nfs41_sequence_ops = {
5475 .rpc_call_done = nfs41_sequence_call_done,
5476 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5477 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5478};
5479
71ac6da9 5480static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5481{
d5f8d3fe 5482 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5483 struct rpc_message msg = {
5484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5485 .rpc_cred = cred,
5486 };
71ac6da9
TM		 5487 struct rpc_task_setup task_setup_data = {
5488 .rpc_client = clp->cl_rpcclient,
5489 .rpc_message = &msg,
5490 .callback_ops = &nfs41_sequence_ops,
5491 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5492 };
fc01cea9 5493
7135840f 5494 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5495 return ERR_PTR(-EIO);
dfb4f309 5496 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5497 if (calldata == NULL) {
7135840f 5498 nfs_put_client(clp);
71ac6da9 5499 return ERR_PTR(-ENOMEM);
fc01cea9 5500 }
d5f8d3fe
TM		 5501 msg.rpc_argp = &calldata->args;
5502 msg.rpc_resp = &calldata->res;
5503 calldata->clp = clp;
71ac6da9 5504 task_setup_data.callback_data = calldata;
fc01cea9 5505
71ac6da9
TM		 5506 return rpc_run_task(&task_setup_data);
5507}
5508
2f60ea6b 5509static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5510{
5511 struct rpc_task *task;
5512 int ret = 0;
5513
2f60ea6b
TM		 5514 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5515 return 0;
71ac6da9
TM		 5516 task = _nfs41_proc_sequence(clp, cred);
5517 if (IS_ERR(task))
5518 ret = PTR_ERR(task);
5519 else
bf294b41 5520 rpc_put_task_async(task);
71ac6da9
TM		 5521 dprintk("<-- %s status=%d\n", __func__, ret);
5522 return ret;
5523}
5524
5525static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5526{
5527 struct rpc_task *task;
5528 int ret;
5529
5530 task = _nfs41_proc_sequence(clp, cred);
5531 if (IS_ERR(task)) {
5532 ret = PTR_ERR(task);
5533 goto out;
5534 }
5535 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5536 if (!ret) {
5537 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5538
5539 if (task->tk_status == 0)
5540 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5541 ret = task->tk_status;
b4410c2f 5542 }
71ac6da9
TM		 5543 rpc_put_task(task);
5544out:
5545 dprintk("<-- %s status=%d\n", __func__, ret);
5546 return ret;
fc01cea9
AA		 5547}
5548
fce5c838
RL		 5549struct nfs4_reclaim_complete_data {
5550 struct nfs_client *clp;
5551 struct nfs41_reclaim_complete_args arg;
5552 struct nfs41_reclaim_complete_res res;
5553};
5554
5555static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5556{
5557 struct nfs4_reclaim_complete_data *calldata = data;
5558
b257957e 5559 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5560 if (nfs41_setup_sequence(calldata->clp->cl_session,
5561 &calldata->arg.seq_args,
fce5c838
RL		 5562 &calldata->res.seq_res, 0, task))
5563 return;
5564
5565 rpc_call_start(task);
5566}
5567
aa5190d0
TM		 5568static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5569{
5570 switch(task->tk_status) {
5571 case 0:
5572 case -NFS4ERR_COMPLETE_ALREADY:
5573 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5574 break;
5575 case -NFS4ERR_DELAY:
aa5190d0 5576 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5577 /* fall through */
5578 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5579 return -EAGAIN;
5580 default:
0400a6b0 5581 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5582 }
5583 return 0;
5584}
5585
fce5c838
RL		 5586static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5587{
5588 struct nfs4_reclaim_complete_data *calldata = data;
5589 struct nfs_client *clp = calldata->clp;
5590 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5591
5592 dprintk("--> %s\n", __func__);
14516c3a
TM		 5593 if (!nfs41_sequence_done(task, res))
5594 return;
fce5c838 5595
aa5190d0
TM		 5596 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5597 rpc_restart_call_prepare(task);
5598 return;
5599 }
fce5c838
RL		 5600 dprintk("<-- %s\n", __func__);
5601}
5602
5603static void nfs4_free_reclaim_complete_data(void *data)
5604{
5605 struct nfs4_reclaim_complete_data *calldata = data;
5606
5607 kfree(calldata);
5608}
5609
5610static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5611 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5612 .rpc_call_done = nfs4_reclaim_complete_done,
5613 .rpc_release = nfs4_free_reclaim_complete_data,
5614};
5615
5616/*
5617 * Issue a global reclaim complete.
5618 */
5619static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5620{
5621 struct nfs4_reclaim_complete_data *calldata;
5622 struct rpc_task *task;
5623 struct rpc_message msg = {
5624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5625 };
5626 struct rpc_task_setup task_setup_data = {
5627 .rpc_client = clp->cl_rpcclient,
5628 .rpc_message = &msg,
5629 .callback_ops = &nfs4_reclaim_complete_call_ops,
5630 .flags = RPC_TASK_ASYNC,
5631 };
5632 int status = -ENOMEM;
5633
5634 dprintk("--> %s\n", __func__);
8535b2be 5635 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5636 if (calldata == NULL)
5637 goto out;
5638 calldata->clp = clp;
5639 calldata->arg.one_fs = 0;
fce5c838
RL		 5640
5641 msg.rpc_argp = &calldata->arg;
5642 msg.rpc_resp = &calldata->res;
5643 task_setup_data.callback_data = calldata;
5644 task = rpc_run_task(&task_setup_data);
acf82b85 5645 if (IS_ERR(task)) {
fce5c838 5646 status = PTR_ERR(task);
acf82b85
DC		 5647 goto out;
5648 }
c34c32ea
AA		 5649 status = nfs4_wait_for_completion_rpc_task(task);
5650 if (status == 0)
5651 status = task->tk_status;
fce5c838 5652 rpc_put_task(task);
acf82b85 5653 return 0;
fce5c838
RL		 5654out:
5655 dprintk("<-- %s status=%d\n", __func__, status);
5656 return status;
5657}
b1f69b75
AA		 5658
5659static void
5660nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5661{
5662 struct nfs4_layoutget *lgp = calldata;
c31663d4 5663 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5664
5665 dprintk("--> %s\n", __func__);
c31663d4
FI		 5666 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5667 * right now covering the LAYOUTGET we are about to send.
5668 * However, that is not so catastrophic, and there seems
5669 * to be no way to prevent it completely.
5670 */
b1f69b75
AA		 5671 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5672 &lgp->res.seq_res, 0, task))
5673 return;
cf7d63f1
FI		 5674 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5675 NFS_I(lgp->args.inode)->layout,
5676 lgp->args.ctx->state)) {
5677 rpc_exit(task, NFS4_OK);
5678 return;
5679 }
b1f69b75
AA		 5680 rpc_call_start(task);
5681}
5682
5683static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5684{
5685 struct nfs4_layoutget *lgp = calldata;
5686 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5687
5688 dprintk("--> %s\n", __func__);
5689
5690 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5691 return;
5692
5693 switch (task->tk_status) {
5694 case 0:
5695 break;
5696 case -NFS4ERR_LAYOUTTRYLATER:
5697 case -NFS4ERR_RECALLCONFLICT:
5698 task->tk_status = -NFS4ERR_DELAY;
5699 /* Fall through */
5700 default:
5701 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5702 rpc_restart_call_prepare(task);
5703 return;
5704 }
5705 }
b1f69b75
AA		 5706 dprintk("<-- %s\n", __func__);
5707}
5708
5709static void nfs4_layoutget_release(void *calldata)
5710{
5711 struct nfs4_layoutget *lgp = calldata;
5712
5713 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5714 put_nfs_open_context(lgp->args.ctx);
5715 kfree(calldata);
5716 dprintk("<-- %s\n", __func__);
5717}
5718
5719static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5720 .rpc_call_prepare = nfs4_layoutget_prepare,
5721 .rpc_call_done = nfs4_layoutget_done,
5722 .rpc_release = nfs4_layoutget_release,
5723};
5724
5725int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5726{
5727 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5728 struct rpc_task *task;
5729 struct rpc_message msg = {
5730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5731 .rpc_argp = &lgp->args,
5732 .rpc_resp = &lgp->res,
5733 };
5734 struct rpc_task_setup task_setup_data = {
5735 .rpc_client = server->client,
5736 .rpc_message = &msg,
5737 .callback_ops = &nfs4_layoutget_call_ops,
5738 .callback_data = lgp,
5739 .flags = RPC_TASK_ASYNC,
5740 };
5741 int status = 0;
5742
5743 dprintk("--> %s\n", __func__);
5744
35124a09 5745 lgp->res.layoutp = &lgp->args.layout;
b1f69b75
AA		 5746 lgp->res.seq_res.sr_slot = NULL;
5747 task = rpc_run_task(&task_setup_data);
5748 if (IS_ERR(task))
5749 return PTR_ERR(task);
5750 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5751 if (status == 0)
5752 status = task->tk_status;
5753 if (status == 0)
5754 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5755 rpc_put_task(task);
5756 dprintk("<-- %s status=%d\n", __func__, status);
5757 return status;
5758}
5759
cbe82603
BH		 5760static void
5761nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5762{
5763 struct nfs4_layoutreturn *lrp = calldata;
5764
5765 dprintk("--> %s\n", __func__);
5766 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5767 &lrp->res.seq_res, 0, task))
5768 return;
5769 rpc_call_start(task);
5770}
5771
5772static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5773{
5774 struct nfs4_layoutreturn *lrp = calldata;
5775 struct nfs_server *server;
a56aaa02 5776 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 5777
5778 dprintk("--> %s\n", __func__);
5779
5780 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5781 return;
5782
5783 server = NFS_SERVER(lrp->args.inode);
5784 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5785 nfs_restart_rpc(task, lrp->clp);
5786 return;
5787 }
a2e1d4f2 5788 spin_lock(&lo->plh_inode->i_lock);
cbe82603 5789 if (task->tk_status == 0) {
cbe82603 5790 if (lrp->res.lrs_present) {
cbe82603 5791 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
cbe82603
BH		 5792 } else
5793 BUG_ON(!list_empty(&lo->plh_segs));
5794 }
a2e1d4f2
FI		 5795 lo->plh_block_lgets--;
5796 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 5797 dprintk("<-- %s\n", __func__);
5798}
5799
5800static void nfs4_layoutreturn_release(void *calldata)
5801{
5802 struct nfs4_layoutreturn *lrp = calldata;
5803
5804 dprintk("--> %s\n", __func__);
a56aaa02 5805 put_layout_hdr(lrp->args.layout);
cbe82603
BH		 5806 kfree(calldata);
5807 dprintk("<-- %s\n", __func__);
5808}
5809
5810static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5811 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5812 .rpc_call_done = nfs4_layoutreturn_done,
5813 .rpc_release = nfs4_layoutreturn_release,
5814};
5815
5816int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5817{
5818 struct rpc_task *task;
5819 struct rpc_message msg = {
5820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5821 .rpc_argp = &lrp->args,
5822 .rpc_resp = &lrp->res,
5823 };
5824 struct rpc_task_setup task_setup_data = {
5825 .rpc_client = lrp->clp->cl_rpcclient,
5826 .rpc_message = &msg,
5827 .callback_ops = &nfs4_layoutreturn_call_ops,
5828 .callback_data = lrp,
5829 };
5830 int status;
5831
5832 dprintk("--> %s\n", __func__);
5833 task = rpc_run_task(&task_setup_data);
5834 if (IS_ERR(task))
5835 return PTR_ERR(task);
5836 status = task->tk_status;
5837 dprintk("<-- %s status=%d\n", __func__, status);
5838 rpc_put_task(task);
5839 return status;
5840}
5841
7f11d8d3
AA		 5842/*
5843 * Retrieve the list of Data Server devices from the MDS.
5844 */
5845static int _nfs4_getdevicelist(struct nfs_server *server,
5846 const struct nfs_fh *fh,
5847 struct pnfs_devicelist *devlist)
5848{
5849 struct nfs4_getdevicelist_args args = {
5850 .fh = fh,
5851 .layoutclass = server->pnfs_curr_ld->id,
5852 };
5853 struct nfs4_getdevicelist_res res = {
5854 .devlist = devlist,
5855 };
5856 struct rpc_message msg = {
5857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5858 .rpc_argp = &args,
5859 .rpc_resp = &res,
5860 };
5861 int status;
5862
5863 dprintk("--> %s\n", __func__);
5864 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5865 &res.seq_res, 0);
5866 dprintk("<-- %s status=%d\n", __func__, status);
5867 return status;
5868}
5869
5870int nfs4_proc_getdevicelist(struct nfs_server *server,
5871 const struct nfs_fh *fh,
5872 struct pnfs_devicelist *devlist)
5873{
5874 struct nfs4_exception exception = { };
5875 int err;
5876
5877 do {
5878 err = nfs4_handle_exception(server,
5879 _nfs4_getdevicelist(server, fh, devlist),
5880 &exception);
5881 } while (exception.retry);
5882
5883 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5884 err, devlist->num_devs);
5885
5886 return err;
5887}
5888EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5889
b1f69b75
AA		 5890static int
5891_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5892{
5893 struct nfs4_getdeviceinfo_args args = {
5894 .pdev = pdev,
5895 };
5896 struct nfs4_getdeviceinfo_res res = {
5897 .pdev = pdev,
5898 };
5899 struct rpc_message msg = {
5900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5901 .rpc_argp = &args,
5902 .rpc_resp = &res,
5903 };
5904 int status;
5905
5906 dprintk("--> %s\n", __func__);
7c513058 5907 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 5908 dprintk("<-- %s status=%d\n", __func__, status);
5909
5910 return status;
5911}
5912
5913int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5914{
5915 struct nfs4_exception exception = { };
5916 int err;
5917
5918 do {
5919 err = nfs4_handle_exception(server,
5920 _nfs4_proc_getdeviceinfo(server, pdev),
5921 &exception);
5922 } while (exception.retry);
5923 return err;
5924}
5925EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5926
863a3c6c
AA		 5927static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5928{
5929 struct nfs4_layoutcommit_data *data = calldata;
5930 struct nfs_server *server = NFS_SERVER(data->args.inode);
5931
5932 if (nfs4_setup_sequence(server, &data->args.seq_args,
5933 &data->res.seq_res, 1, task))
5934 return;
5935 rpc_call_start(task);
5936}
5937
5938static void
5939nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
5940{
5941 struct nfs4_layoutcommit_data *data = calldata;
5942 struct nfs_server *server = NFS_SERVER(data->args.inode);
5943
5944 if (!nfs4_sequence_done(task, &data->res.seq_res))
5945 return;
5946
5947 switch (task->tk_status) { /* Just ignore these failures */
5948 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
5949 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
5950 case NFS4ERR_BADLAYOUT: /* no layout */
5951 case NFS4ERR_GRACE: /* loca_recalim always false */
5952 task->tk_status = 0;
5953 }
5954
5955 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5956 nfs_restart_rpc(task, server->nfs_client);
5957 return;
5958 }
5959
5960 if (task->tk_status == 0)
5961 nfs_post_op_update_inode_force_wcc(data->args.inode,
5962 data->res.fattr);
5963}
5964
5965static void nfs4_layoutcommit_release(void *calldata)
5966{
5967 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 5968 struct pnfs_layout_segment *lseg, *tmp;
863a3c6c 5969
db29c089 5970 pnfs_cleanup_layoutcommit(data);
863a3c6c 5971 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 5972 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
5973 list_del_init(&lseg->pls_lc_list);
5974 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
5975 &lseg->pls_flags))
5976 put_lseg(lseg);
5977 }
863a3c6c
AA		 5978 put_rpccred(data->cred);
5979 kfree(data);
5980}
5981
5982static const struct rpc_call_ops nfs4_layoutcommit_ops = {
5983 .rpc_call_prepare = nfs4_layoutcommit_prepare,
5984 .rpc_call_done = nfs4_layoutcommit_done,
5985 .rpc_release = nfs4_layoutcommit_release,
5986};
5987
5988int
ef311537 5989nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 5990{
5991 struct rpc_message msg = {
5992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
5993 .rpc_argp = &data->args,
5994 .rpc_resp = &data->res,
5995 .rpc_cred = data->cred,
5996 };
5997 struct rpc_task_setup task_setup_data = {
5998 .task = &data->task,
5999 .rpc_client = NFS_CLIENT(data->args.inode),
6000 .rpc_message = &msg,
6001 .callback_ops = &nfs4_layoutcommit_ops,
6002 .callback_data = data,
6003 .flags = RPC_TASK_ASYNC,
6004 };
6005 struct rpc_task *task;
6006 int status = 0;
6007
6008 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6009 "lbw: %llu inode %lu\n",
6010 data->task.tk_pid, sync,
6011 data->args.lastbytewritten,
6012 data->args.inode->i_ino);
6013
6014 task = rpc_run_task(&task_setup_data);
6015 if (IS_ERR(task))
6016 return PTR_ERR(task);
ef311537 6017 if (sync == false)
863a3c6c
AA		 6018 goto out;
6019 status = nfs4_wait_for_completion_rpc_task(task);
6020 if (status != 0)
6021 goto out;
6022 status = task->tk_status;
6023out:
6024 dprintk("%s: status %d\n", __func__, status);
6025 rpc_put_task(task);
6026 return status;
6027}
fca78d6d
BS		 6028
6029static int
6030_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6031 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6032{
6033 struct nfs41_secinfo_no_name_args args = {
6034 .style = SECINFO_STYLE_CURRENT_FH,
6035 };
6036 struct nfs4_secinfo_res res = {
6037 .flavors = flavors,
6038 };
6039 struct rpc_message msg = {
6040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6041 .rpc_argp = &args,
6042 .rpc_resp = &res,
6043 };
6044 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6045}
6046
6047static int
6048nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6049 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6050{
6051 struct nfs4_exception exception = { };
6052 int err;
6053 do {
6054 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6055 switch (err) {
6056 case 0:
6057 case -NFS4ERR_WRONGSEC:
6058 case -NFS4ERR_NOTSUPP:
6059 break;
6060 default:
6061 err = nfs4_handle_exception(server, err, &exception);
6062 }
6063 } while (exception.retry);
6064 return err;
6065}
6066
6067static int
6068nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6069 struct nfs_fsinfo *info)
6070{
6071 int err;
6072 struct page *page;
6073 rpc_authflavor_t flavor;
6074 struct nfs4_secinfo_flavors *flavors;
6075
6076 page = alloc_page(GFP_KERNEL);
6077 if (!page) {
6078 err = -ENOMEM;
6079 goto out;
6080 }
6081
6082 flavors = page_address(page);
6083 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6084
6085 /*
6086 * Fall back on "guess and check" method if
6087 * the server doesn't support SECINFO_NO_NAME
6088 */
6089 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6090 err = nfs4_find_root_sec(server, fhandle, info);
6091 goto out_freepage;
6092 }
6093 if (err)
6094 goto out_freepage;
6095
6096 flavor = nfs_find_best_sec(flavors);
6097 if (err == 0)
6098 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6099
6100out_freepage:
6101 put_page(page);
6102 if (err == -EACCES)
6103 return -EPERM;
6104out:
6105 return err;
6106}
7d974794
BS		 6107static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6108{
6109 int status;
6110 struct nfs41_test_stateid_args args = {
6111 .stateid = &state->stateid,
6112 };
6113 struct nfs41_test_stateid_res res;
6114 struct rpc_message msg = {
6115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6116 .rpc_argp = &args,
6117 .rpc_resp = &res,
6118 };
6119 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6120 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6121 return status;
6122}
6123
6124static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6125{
6126 struct nfs4_exception exception = { };
6127 int err;
6128 do {
6129 err = nfs4_handle_exception(server,
6130 _nfs41_test_stateid(server, state),
6131 &exception);
6132 } while (exception.retry);
6133 return err;
6134}
9aeda35f
BS		 6135
6136static int _nfs4_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6137{
6138 int status;
6139 struct nfs41_free_stateid_args args = {
6140 .stateid = &state->stateid,
6141 };
6142 struct nfs41_free_stateid_res res;
6143 struct rpc_message msg = {
6144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6145 .rpc_argp = &args,
6146 .rpc_resp = &res,
6147 };
6148
6149 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6150 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6151 return status;
6152}
6153
6154static int nfs41_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6155{
6156 struct nfs4_exception exception = { };
6157 int err;
6158 do {
6159 err = nfs4_handle_exception(server,
6160 _nfs4_free_stateid(server, state),
6161 &exception);
6162 } while (exception.retry);
6163 return err;
6164}
557134a3
AA		 6165#endif /* CONFIG_NFS_V4_1 */
6166
591d71cb 6167struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6168 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6169 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6170 .recover_open = nfs4_open_reclaim,
6171 .recover_lock = nfs4_lock_reclaim,
591d71cb 6172 .establish_clid = nfs4_init_clientid,
90a16617 6173 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6174};
6175
591d71cb
AA		 6176#if defined(CONFIG_NFS_V4_1)
6177struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6178 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6179 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6180 .recover_open = nfs4_open_reclaim,
6181 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6182 .establish_clid = nfs41_init_clientid,
b4b82607 6183 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6184 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6185};
6186#endif /* CONFIG_NFS_V4_1 */
6187
6188struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6189 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6190 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6191 .recover_open = nfs4_open_expired,
6192 .recover_lock = nfs4_lock_expired,
6193 .establish_clid = nfs4_init_clientid,
90a16617 6194 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6195};
6196
6197#if defined(CONFIG_NFS_V4_1)
6198struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6199 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6200 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6201 .recover_open = nfs41_open_expired,
6202 .recover_lock = nfs41_lock_expired,
4d643d1d 6203 .establish_clid = nfs41_init_clientid,
b4b82607 6204 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6205};
591d71cb 6206#endif /* CONFIG_NFS_V4_1 */
1da177e4 6207
29fba38b
BH		 6208struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6209 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6210 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6211 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6212};
6213
6214#if defined(CONFIG_NFS_V4_1)
6215struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6216 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6217 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6218 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6219};
6220#endif
6221
97dc1359
TM		 6222static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6223 .minor_version = 0,
6224 .call_sync = _nfs4_call_sync,
e047a10c 6225 .validate_stateid = nfs4_validate_delegation_stateid,
fca78d6d 6226 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6227 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6228 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6229 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6230};
6231
6232#if defined(CONFIG_NFS_V4_1)
6233static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6234 .minor_version = 1,
6235 .call_sync = _nfs4_call_sync_session,
e047a10c 6236 .validate_stateid = nfs41_validate_delegation_stateid,
fca78d6d 6237 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6238 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6239 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6240 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6241};
6242#endif
6243
97dc1359
TM		 6244const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6245 [0] = &nfs_v4_0_minor_ops,
6246#if defined(CONFIG_NFS_V4_1)
6247 [1] = &nfs_v4_1_minor_ops,
6248#endif
6249};
6250
92e1d5be 6251static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6252 .permission = nfs_permission,
6253 .getattr = nfs_getattr,
6254 .setattr = nfs_setattr,
64c2ce8b
AK		 6255 .getxattr = generic_getxattr,
6256 .setxattr = generic_setxattr,
6257 .listxattr = generic_listxattr,
6258 .removexattr = generic_removexattr,
6b3b5496
BF		 6259};
6260
509de811 6261const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6262 .version = 4, /* protocol version */
6263 .dentry_ops = &nfs4_dentry_operations,
6264 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6265 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 6266 .getroot = nfs4_proc_get_root,
6267 .getattr = nfs4_proc_getattr,
6268 .setattr = nfs4_proc_setattr,
2b3de441 6269 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 6270 .lookup = nfs4_proc_lookup,
6271 .access = nfs4_proc_access,
6272 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6273 .create = nfs4_proc_create,
6274 .remove = nfs4_proc_remove,
6275 .unlink_setup = nfs4_proc_unlink_setup,
6276 .unlink_done = nfs4_proc_unlink_done,
6277 .rename = nfs4_proc_rename,
d3d4152a
JL		 6278 .rename_setup = nfs4_proc_rename_setup,
6279 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6280 .link = nfs4_proc_link,
6281 .symlink = nfs4_proc_symlink,
6282 .mkdir = nfs4_proc_mkdir,
6283 .rmdir = nfs4_proc_remove,
6284 .readdir = nfs4_proc_readdir,
6285 .mknod = nfs4_proc_mknod,
6286 .statfs = nfs4_proc_statfs,
6287 .fsinfo = nfs4_proc_fsinfo,
6288 .pathconf = nfs4_proc_pathconf,
e9326dca 6289 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6290 .decode_dirent = nfs4_decode_dirent,
6291 .read_setup = nfs4_proc_read_setup,
ec06c096 6292 .read_done = nfs4_read_done,
1da177e4 6293 .write_setup = nfs4_proc_write_setup,
788e7a89 6294 .write_done = nfs4_write_done,
1da177e4 6295 .commit_setup = nfs4_proc_commit_setup,
788e7a89 6296 .commit_done = nfs4_commit_done,
1da177e4 6297 .lock = nfs4_proc_lock,
e50a1c2e 6298 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6299 .close_context = nfs4_close_context,
2b484297 6300 .open_context = nfs4_atomic_open,
45a52a02 6301 .init_client = nfs4_init_client,
5a5ea0d4 6302 .secinfo = nfs4_proc_secinfo,
1da177e4
LT		 6303};
6304
64c2ce8b
AK		 6305static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6306 .prefix = XATTR_NAME_NFSV4_ACL,
6307 .list = nfs4_xattr_list_nfs4_acl,
6308 .get = nfs4_xattr_get_nfs4_acl,
6309 .set = nfs4_xattr_set_nfs4_acl,
6310};
6311
6312const struct xattr_handler *nfs4_xattr_handlers[] = {
6313 &nfs4_xattr_nfs4_acl_handler,
6314 NULL
6315};
6316
1da177e4
LT		 6317/*
6318 * Local variables:
6319 * c-basic-offset: 8
6320 * End:
6321 */
Linux 6.x block layer and io_uring tree(s)